AstroLabAstroLab feature reference
169 functional items across 17 modules, plus inventories from the shipped catalogue.
Reference for the Web version. “Open module” links open the relevant view or settings; they do not automatically perform every described action. Inventories provide direct content links. Scientific limits and unavailable functions are explicit.
Download the structured JSON reference
Time and dates
Set an instant
time-1-1— Open Date and time in settings; two compact endless wheels for days and fine time adjustment, plus direct date entry.time-1-2— Change a field with +/−, vertical drag, mouse wheel or keyboard arrows.time-1-3— Type eight digits DDMMYYYY or a date with separators; leap-year validation.time-1-4— Clamp the day to the selected month: the 31st becomes its last valid day.time-1-5— Apply changes immediately and pause the simulation when editing.time-1-6— UTC clock in the orbital map; local time of the terrestrial location in the planetarium.
Playback
time-2-1— Play, pause, speed up to 500 days/s, slow down and reverse time. HD 196885 starts at 300 days/s.time-2-2— Speed wheel without jumping to the touch position; adjustment relative to the initial gesture.time-2-3— Time wheel with selectable sensitivities; time-of-day slider.time-2-4— Return to now; jump to sunset or advance six hours in the terrestrial sky.time-2-5— Dates accepted by the interface do not extend the scientific validity of models or mission excerpts.
Planetarium and observation
Location and orientation
sky-1-1— Observe from Earth, planets, the Moon and available moons; a fixed position in space is also available.sky-1-2— Choose a city, search for a place on the map or enter latitude and longitude.sky-1-3— Request geolocation; retain a saved position when access is unavailable.sky-1-4— Drag to look around; adjust elevation and field of view from 0.4° to 150°.sky-1-5— Point north, east, south or west; return to the horizon, look down or use the wide-angle view.sky-1-6— Enable orientation sensors with permission; stop sensor tracking and resume gestures.sky-1-7— Track an available star, planet, moon, constellation or satellite; offset its framing.sky-1-8— From Jupiter, Saturn, Uranus and Neptune, Daytime atmosphere controls illustrative haze concentrated near the horizon. Theoretical cloud-level viewpoint, no solid surface; light pollution remains Earth-only.sky-1-9— Read location, coordinates, azimuth, altitude, sunrise and sunset where applicable.
Layers
sky-2-1— Show stars by magnitude bands; control exposure and additional names.sky-2-2— Show the Milky Way and available deep-sky objects.sky-2-3— Choose visible bodies individually and use the Other bodies group.sky-2-4— Show compass, horizontal grid, equatorial grid and available guides.sky-2-5— Adjust daytime atmosphere and light pollution independently from 0 to 100%, with quick toggles; indicative night brightness 22–17 mag/arcsec², dim stars and Milky Way fading. Film parameters skyAtmosphereLevel and skyLightPollution animate through light:{parameter:{from,to}}. No automatic city measurements.sky-2-6— Choose mountain, meadow, coast, body-specific ground or no ground.sky-2-7— Enable 3D panorama terrain; landscapes are not surveys of the actual location.sky-2-8— Show stellar and planetary trails, adjust screen duration and available effects.
Constellations and cultures
Catalogues
cultures-1-1— 88 international figures; these are not the official boundaries of IAU regions.cultures-1-2— 312 positioned Chinese asterisms, with available cultural names.cultures-1-3— Five Mexica figures: Mamalhuaztli, Tianquiztli, Citlaltlachtli, Xonecuilli and Colotl Ixayac. A partial selection with debated identifications.cultures-1-4— Seven figures in the Tupi-Guarani selection; not a synthesis of all the peoples concerned.cultures-1-5— Choose a tradition in an AstroLab custom menu; see available figure and illustration counts.
Lines, artwork and tracking
cultures-2-1— Artwork enabled by default in the planetarium; choose lines and artwork separately in settings; the shortcut hides or shows this selection without changing it.cultures-2-2— 25 Western, five Mexica and five original Chinese illustrations, each placed using three reference stars.cultures-2-3— Images remain attached to the sky when rotating, zooming or changing date or location.cultures-2-4— Tapping the name opens a card with tradition, star count, framing and explicit locking; only the locked figure remains displayed.cultures-2-5— Focus multiple figures from one culture through selectConstellations and films; restore state after playback.cultures-2-6— Chinese drawings are contemporary interpretations of five asterisms; the Tupi selection does not yet include artwork.cultures-2-7— Respect horizon, field of view and brightness: an available catalogue does not mean all its figures are visible simultaneously.
Artificial satellites
Select and observe
satellites-1-1— Show artificial satellites in the orbital map and terrestrial sky.satellites-1-2— Select categories, enable all categories or hide all.satellites-1-3— Show or hide names and trails; select a satellite and open its card.satellites-1-4— Track an available satellite; tracking may stop when it passes below the visible horizon.satellites-1-5— Explicit embedded-catalogue epochs; illustrative trajectories outside their temporal range.satellites-1-6— Planetarium calculations pause above three simulated minutes per second; resume with a fresh sample.satellites-1-7— Selected categories persist during suspension; the orbital threshold is separate.
Stellar navigation
Spatial exploration
stellar-1-1— Zoom out from a system to reach the stars; approach a known system to reveal its planets. Shared orbital gestures at all three scales.stellar-1-2— Set physical speed from 1 to 99.9% of c (90% by default), relativistic effects and time advancement, enabled by default. Animation is independent of physical duration.stellar-1-3— Directional aberration and approximate Doppler colour/exposure during travel. Distinct reference and onboard times; solar ephemerides limited to 1800–2050.stellar-1-4— Approach an illustrative photosphere; discover Delta Cephei variability (5.366 days), without inventing periods for unknown stars.stellar-1-5— Explore the stellar neighbourhood in depth; distinguish constellation projections from star positions.stellar-1-6— Search for a star, read its properties and travel to it when its distance is known.stellar-1-7— Progressive approach in the native orbital camera; zoom changes neither viewer nor viewport.stellar-1-8— Orbit the arrival star, change framing and depart for another target.stellar-1-9— Show or hide constellation lines and sky background; adjust line opacity.stellar-1-10— Adjust travel-trail length and intensity; stars without distances remain in the orientation background.stellar-1-11— Propagate available velocities in a bounded window around J2000; no stellar evolution or galactic acceleration.
Extrasolar systems
Systems and models
extrasolar-1-1— Choose Kepler-16, Kepler-47, TRAPPIST-1, WASP-76, 55 Cancri and HD 80606 in the system picker.extrasolar-1-2— Explore single stars, binaries and their planets; read catalogue properties and references.extrasolar-1-3— Search and select objects in the view; track, frame and measure using available controls.extrasolar-1-4— Change time and observe approximate Keplerian orbits.extrasolar-1-5— Illustrative textures: no observed maps of exoplanet surfaces.extrasolar-1-6— Missing phases and orientations are illustrative; systems share the orbital engine and its controls.
Galaxy atlas
Atlas and cosmic time
galaxies-1-1— Discover the illustrative active nucleus of 3C 273; open Milky Way stars from its card. Travel effects use the same engine as the stars.galaxies-1-2— Navigate the embedded galaxy sample and Local Group objects.galaxies-1-3— Search for a galaxy, select it and inspect available data.galaxies-1-4— Approach a target, adjust framing and measure separations.galaxies-1-5— Change cosmic epoch between 0.01 and 35 billion years; visualise the changing scale factor.galaxies-1-6— Keep the bound Local Group without applying the model’s general expansion.galaxies-1-7— Distinguish redshift-estimated distance, drawing distance and cosmological quantities.galaxies-1-8— Magnitude-limited, incomplete sample; no simulation of mergers, hydrodynamics or individual ancestors.
Journeys and missions
Routes
missions-1-1— Voyager 1 and 2, Apollo 11, Cassini–Huygens, Juno, New Horizons, Rosetta, Webb, Hubble and Artemis II.missions-1-2— Open the mission notebook: context, dated stages, anecdotes and references.missions-1-3— Start at departure or jump directly to a stage.missions-1-4— Track the spacecraft, approach its route or view the entire journey.missions-1-5— Retain elapsed history; optionally show the future route.missions-1-6— Read physical speed and distances; framing and sizes remain adapted for readability.missions-1-7— Take manual control of speed and zoom; exit the guided journey.missions-1-8— Hubble: excerpt from 22 October 2026; Artemis II: April 2026 lunar flyby, not lunar orbit insertion.missions-1-9— Local interpolation of embedded excerpts without extrapolation outside their interval; distinguish reconstruction from ephemerides.
Discoveries and catalogue
Explore and find
discoveries-1-1— Shared catalogue of interactive views and films, with detail page, description, learning value and thumbnail.discoveries-1-2— Start with Featured, then browse Solar System, Stars & galaxies, Skies & cultures, Understand, Space missions and My creations. All discoveries remains accessible.discoveries-1-3— Open a freely explorable view or play a film; Back restores the catalogue category, selection and scroll position.discoveries-1-4— Instant local search across titles, descriptions and French/English keywords, ignoring accents. Featured searches the entire catalogue; elsewhere, Search everywhere expands the scope. Segmented topic buttons and format filters. Stars & galaxies groups all its discoveries directly without a submenu. Back also preserves search and filters.discoveries-1-5— Dated terrestrial eclipses; search for the previous or next one visible from the observer’s location.discoveries-1-6— Solar eclipse by Earth seen from the Moon; start roughly three playback seconds before contact.discoveries-1-7— Mars from northern Phobos, Jupiter from Europa and other off-Earth viewpoints.discoveries-1-8— Birth sky and orientation scenes; date and location are part of the scene.discoveries-1-9— Public FR/EN pages for built-in discoveries, with direct application links.
Educational films
Playback and direction
films-1-1— Keep multiple solar-system bodies framed throughout a shot, even with a moving camera: frame.track adjusts centre and distance with caption margins. It does not prevent occultation.films-1-2— Films composed of chapters and shots; synchronised camera movements, text and astronomical scenes.films-1-3— Play, pause, progress, previous/next and playback-rate controls.films-1-4— FR/EN explanatory text, timing that accounts for reading and reduced motion following system preferences.films-1-5— Layer choices during playback; retain measurements without preventing controls from fading.films-1-6— Soundtrack, ambience, volumes and ducking during relevant sequences.films-1-7— Restore scene and tracking choices after playback according to the player flow.films-1-8— Cultural narrative connecting international, Chinese, Mexica and Tupi traditions; attributed anecdotes.films-1-9— Create personal films with original observations (world, place, date, target), or reuse a precisely suited view; validated parameters.
Learning and experiments
Articles
learning-1-1— Library by level; main articles and grouped related concepts.learning-1-2— 25 illustrated topics: discovery history, anecdotes, physical explanations, exercises and sources.learning-1-3— Main visual directly after the introduction; enlargeable static versions, shaded textures and fine lines shared across illustrations.learning-1-4— Animations: libration, phases, rotations, resonances, transfers, gravity assists and other phenomena.learning-1-5— Compact playback control; pause, resume and an always-usable progress slider that dims when idle. A lunar map is projected onto a sphere to show libration.learning-1-6— Stop offscreen, in hidden tabs or closed articles; respect reduced-motion preferences.learning-1-7— Explicit exaggerated scales; teaching illustrations distinguished from dated ephemerides.
Hands-on controls
learning-2-1— Enlarge a diagram in an in-page dialog, keep its settings and close with the cross, Escape or Back. The AstroLab website link opens a new tab.learning-2-2— Experiment with lunar phases, seasons and eclipses using diagram sliders.learning-2-3— Change mass and distance for gravity; compare attraction and tidal effects.learning-2-4— Change orbit size, eccentricity and phase; understand Kepler’s laws.learning-2-5— Compare synchronous and free rotation; follow a surface marker.learning-2-6— Simulate a round-trip signal and read its distance-dependent delay.learning-2-7— Manipulate transfers and gravity assists; read numerical results, explanations and model limits.learning-2-8— Access journeys and the size comparator from relevant articles.
Assisted creation and personal content
From request to result
creation-1-1— Create a view or film with +; enter a question or intent.creation-1-2— Mistral by default; models load automatically online, with a saved choice per provider and ordered fallback among available models.creation-1-3— Validated key kept locally through updates; explicit deletion with Forget key or a full reset, never in shared links or content.creation-1-4— Compose narrative, observations, framing and layers using engine capabilities; supply available local visibility and eclipse calculations to the review.creation-1-5— Validate identifiers, values and schemas; reject incompatible parameters.creation-1-6— Choose category and level where offered; anecdotes and distinctions between facts, models and traditions.creation-1-7— Find creations in My content; edit, replay or delete with confirmation.creation-1-8— Retain local requests and tasks across interruptions; generation requires network and provider access.creation-1-9— A free application does not mean AI provider calls are free.
Measurements and comparison
Measure
measure-1-1— Choose two objects to measure their separation; dismissible readout and line in the scene.measure-1-2— Read angle and physical distance in the planetarium when data allow it.measure-1-3— Distances between stars, planets and satellites in a common physical frame; not inferred from enlarged sizes.measure-1-4— Retain angle when distance is unknown; mark illustrative orbits.measure-1-5— Compare relative body diameters in a dedicated view, with or without the Sun.measure-1-6— Zoom and pan the comparator; settings independent of the orbital map.
Sound and ambience
Listen
audio-1-1— Enable or mute global sound; adjust music and ambience volume.audio-1-2— Choose embedded tracks, ambiences and available playback options.audio-1-3— Use available personal-audio features; retain choices locally.audio-1-4— Read muted, zero-volume or interrupted status; the browser may require an interaction.audio-1-5— Handle application interruptions and resumptions; music sources and licences are accessible.
Application, accessibility and offline use
Preferences and operation
application-1-1— FR/EN interface and content; stable dynamic translation of results and explanations.application-1-2— Adjust text size; visible keyboard focus, touch controls and accessible labels.application-1-3— Choose automatic, standard or detailed quality; progressive texture loading.application-1-4— Preserve active touch cadence; space orbital renders only when paused and settled.application-1-5— Install the website as a Web app; open and load desired content before offline use.application-1-6— Progressive cache and reuse of unchanged resources; optional media are not all downloaded at startup.application-1-7— Check for a new Web version, defer activation during certain operations and restore dialogs.application-1-8— Reset AstroLab data; the operation is limited to application storage.application-1-9— Initial guided tour and contextual help; written guide, reference, methods and credits are accessible.application-1-10— Free access without required donations; optional MSF fundraiser link, with no payment to unlock features.application-1-11— Native and Web versions may differ; this reference describes the Web release, not physical iPhone validation.
Detailed shipped-content inventories
Discoveries and films (131)
film-one-night· Journeys · One night, a thousand motionsfilm-earth-elsewhere· Journeys · Earth from elsewherefilm-appearances· Journeys · Appearances can deceivefilm-voyager-grand-tour· Journeys · Voyager: the grand tour of the giantsfilm-solar-scales· Journeys · From Earth’s neighbourhood to the solar system’s outskirtsfilm-gravity· Journeys · Gravity, architect and enginefilm-alignments· Journeys · When worlds alignfilm-myths· Journeys · One sky, many storiesfilm-latitudes· Journeys · Change latitude, change skyfilm-three-missions· Journeys · Three missions, three ways to explorefilm-other-solar-systems· Journeys · Other ways to make a planetary systemfilm-galaxy-neighbours· Journeys · From neighbours to a galaxy mapfilm-earth-to-galaxies· Journeys · From Earth to galaxiesfilm-galaxies-in-depth· Journeys · Galaxies in depthfilm-expansion-without-explosion· Journeys · Expansion is not an explosionfilm-black-holes· Journeys · Why does light bend around a black hole?film-compact-systems· Journeys · Stars reveal black holesfilm-variable-stars· Journeys · The pulse of starsfilm-presentation· Journeys · AstroLab — The Universe at your fingertipsgravity-earth· Concepts · Gravity around Earthvoyager-1· Journeys · Voyager 1 · toward interstellar spacevoyager-2· Journeys · Voyager 2 · the Grand Tourcassini· Journeys · Cassini–Huygens · the road to Saturnwebb· Journeys · James Webb · the journey to L2birth-sky· Skies · The sky on your birthdaymars-two-moons· Celestial bodies · The two moons of Marsearth-artificial-satellites· Celestial bodies · Satellites around Eartheclipse-2024-04-08-dallas· Skies · Dallas · 04/08/2024eclipse-2026-08-12-burgos· Skies · Burgos · 08/12/2026eclipse-2027-08-02-luxor· Skies · Luxor · 08/02/2027eclipse-2028-07-22-sydney· Skies · Sydney · 07/22/2028eclipse-2030-11-25-gaborone· Skies · Gaborone · 11/25/2030polar-trails· Skies · Circling the northgalactic-center· Skies · At the heart of the Milky Waysunset-earth· Skies · Golden hourmoon-earth· Skies · Earth from the Moonmars-sun· Skies · The Sun from Marsmercury-sun· Skies · Under Mercury’s Sunmoon-farside· Skies · The Moon’s far sideparis-sky· Skies · The sky over Parisequator-sky· Skies · Beneath the equatorsouthern-sky· Skies · The southern skysystem-moon· Celestial bodies · Our Earth–Moon pairsystem-saturn· Celestial bodies · Saturnsystem-jupiter· Celestial bodies · Jupitersystem-mars· Celestial bodies · Marssystem-uranus· Celestial bodies · Uranussystem-neptune· Celestial bodies · Neptunesystem-sun· Celestial bodies · Our starlearn-phases· Concepts · Why the Moon changes shapelearn-seasons· Concepts · Two hemispheres, two seasonslearn-eclipses· Concepts · Why isn’t there an eclipse every month?compare-worlds· Concepts · A family of very different sizesplanet-mercury· Celestial bodies · Mercuryplanet-venus· Celestial bodies · Venusplanet-earth· Celestial bodies · Earthstellar-orion· Celestial bodies · Behind Orion’s outlinestellar-parallax· Concepts · Near and far: stellar parallaxstellar-sirius· Celestial bodies · Find the Sun from Siriusmoon-earth-eclipse-2025· Skies · A solar eclipse from the Moonphobos-mars-horizon· Skies · Mars on the horizon of Phoboseuropa-jupiter-horizon· Skies · Jupiter from Europa’s iceconstellation-art· Skies · Orion takes shapesky-chinese· Skies · Beidou, the Northern Dippersky-mexica· Skies · Tianquiztli, the celestial marketsky-tupi· Skies · The Old Man in the skylearn-libration· Concepts · The Moon reveals morelearn-assist· Concepts · Gaining speed from a planetsystem-kepler-16· Celestial bodies · Kepler-16 · Two suns, one planetsystem-kepler-47· Celestial bodies · Kepler-47 · Three worlds, two sunssystem-trappist-1· Celestial bodies · TRAPPIST-1 · Seven rocky worldssystem-wasp-76· Celestial bodies · WASP-76 · Iron rainsystem-55-cancri· Celestial bodies · 55 Cancri · A magma worldsystem-hd-80606· Celestial bodies · HD 80606 · An extreme orbitgalaxies-2mrs· Journeys · Among twenty thousand galaxieskepler-16-follow-a· Celestial bodies · Kepler-16 · Beside star Atrappist-1-follow-e· Celestial bodies · TRAPPIST-1 e · A planet and its stargalaxies-local-group· Journeys · The Local Group · Five landmarksgalaxies-ngc4486b-field· Journeys · Around NGC 4486B · A galaxy fieldsystem-hd-196885· Celestial bodies · HD 196885 · A planet travels with its starstellar-relativity· Journeys · Travel at 90% of light speedstellar-delta-cephei· Celestial bodies · Delta Cephei · a variable starquasar-3c273· Journeys · 3C 273 · an active nucleusjupiter-limb· Celestial bodies · Jupiter · the cloud limbblack-hole-sgr-a· Celestial bodies · Sagittarius A* · bent lightblack-hole-m87· Celestial bodies · M87* · bent lightsystem-sgr-a-stars· Celestial bodies · Sagittarius A* · orbiting starssystem-gaia-bh1· Celestial bodies · Gaia BH1 · an invisible companionstellar-eta-aquilae· Celestial bodies · Eta Aquilae · a variable starstellar-zeta-geminorum· Celestial bodies · Zeta Geminorum · a variable starlearn-compact-systems· Concepts · Stars around black holeslearn-variable-stars· Concepts · Stars keep the beatlearn-expansion-universe· Concepts · Big Bang, expansion and Hubble’s lawsystem-sgr-a-s2· Celestial bodies · S2 · close to Sagittarius A*learn-andromeda· Concepts · Andromeda: a constellation, a galaxylearn-gravity· Concepts · The gravitational fieldlearn-transfer· Concepts · Traveling from one orbit to anotherlearn-heliosphere· Concepts · Where does the Solar System end?learn-day· Concepts · Day and nightlearn-light· Concepts · Looking far away means looking into the pastlearn-orbit· Concepts · Why a planet does not falllearn-tides· Concepts · Tideslearn-retrograde· Concepts · The apparent backward motion of planetslearn-rings· Concepts · Rings and the Roche limitlearn-resonance· Concepts · Orbital resonanceslearn-precession· Concepts · Axial precessionlearn-lagrange· Concepts · Lagrange pointslearn-relativity· Concepts · Mercury’s precessionevolution-solar· Stars et galaxies · The life of the Sunevolution-red-dwarf· Stars et galaxies · Proxima, a long lifeevolution-supernova· Stars et galaxies · Betelgeuse and the supernovaevolution-collapse· Stars et galaxies · Rigel and stellar collapsecosmic-expansion-journey· Stars et galaxies · The expanding Universecomet-halley· Solar System · Halley · the 1986 passageasteroid-bennu· Solar System · Bennu · seconds to collect billions of yearsasteroid-ryugu· Solar System · Ryugu · bringing a dark world homeasteroid-itokawa· Solar System · Itokawa · dust connects two worldsasteroid-eros· Solar System · Eros · the orbiter that survived landingasteroid-toutatis· Solar System · Toutatis · a tumbling worldasteroid-apophis· Solar System · Apophis · Earth bends the routeasteroid-duende· Solar System · Duende · below geostationary altitudeosiris-rex· Journeys · OSIRIS-RExlearn-compare· Concepts · Comparing sizesapollo-11· Journeys · Apollo 11new-horizons· Journeys · New Horizonsrosetta· Journeys · Rosetta–Philaejuno· Journeys · Junohubble· Journeys · Hubbleartemis-ii· Journeys · Artemis IIlibration-earth-from-moon· Skies · Earth sways in the lunar skylibration-moon-from-earth· Skies · The Moon beyond the same face
Articles and teaching illustrations (28)
International (88)
Aql· Aigle · artwork availableAnd· Andromède · artwork availableScl· SculptorAra· AraLib· Balance · artwork availableCet· BaleineAri· Bélier · artwork availableSct· ScutumPyx· PyxisBoo· BouvierCae· CaelumCha· ChamaeleonCnc· Cancer · artwork availableCap· Capricorne · artwork availableCar· CarinaCas· Cassiopée · artwork availableCen· CentaurusCep· CepheusCom· Coma BerenicesCVn· Canes VenaticiAur· CocherCol· ColumbaCir· CircinusCrt· CraterCrA· Corona AustralisCrB· Couronne boréale · artwork availableCrv· Corvus · artwork availableCru· Croix du Sud · artwork availableCyg· Cygne · artwork availableDel· DelphinusDor· DoradoDra· Dragon · artwork availableNor· NormaEri· EridanusSge· SagittaFor· FornaxGem· Gémeaux · artwork availableCam· CamelopardalisCMa· Grand ChienUMa· Grande Ourse · artwork availableGru· GrusHer· HerculeHor· HorologiumHya· HydraHyi· HydrusInd· IndusLac· LacertaMon· MonocerosLep· LepusLeo· Lion · artwork availableLup· LupusLyn· LynxLyr· Lyre · artwork availableAnt· AntliaMic· MicroscopiumMus· MuscaOct· OctansAps· ApusOph· OphiuchusOri· Orion · artwork availablePav· PavoPeg· Pégase · artwork availablePic· PictorPer· PerséeEqu· EquuleusCMi· Petit ChienLMi· Leo MinorVul· VulpeculaUMi· Petite Ourse · artwork availablePhe· PhoenixPsc· Poissons · artwork availablePsA· Piscis AustrinusVol· VolansPup· PuppisRet· ReticulumSgr· Sagittaire · artwork availableSco· Scorpion · artwork availableSer· SerpensSex· SextansMen· MensaTau· Taureau · artwork availableTel· TelescopiumTuc· TucanaTri· TriangulumTrA· Triangulum AustraleAqr· Verseau · artwork availableVir· Vierge · artwork availableVel· Vela
Chinese (312)
chinese-001· 毕宿 · artwork availablechinese-002· 壁宿chinese-003· 参宿chinese-004· 氐宿chinese-005· 斗宿chinese-006· 房宿chinese-007· 鬼宿chinese-008· 箕宿 · artwork availablechinese-009· 角宿chinese-010· 井宿 · artwork availablechinese-011· 亢宿chinese-012· 奎宿chinese-013· 柳宿chinese-014· 娄宿chinese-015· 昴宿chinese-016· 牛宿chinese-017· 女宿chinese-018· 室宿chinese-019· 太微右垣chinese-020· 太微左垣chinese-021· 天市右垣chinese-022· 天市左垣chinese-023· 危宿chinese-024· 尾宿chinese-025· 胃宿chinese-026· 心宿chinese-027· Xing Xiuchinese-028· 虚宿chinese-029· 翼宿chinese-030· 张宿chinese-031· 轸宿 · artwork availablechinese-032· 紫微右垣chinese-033· 紫微左垣chinese-034· 觜宿chinese-035· 八谷chinese-036· 八魁chinese-037· 败瓜chinese-038· 败臼chinese-039· 北斗 · artwork availablechinese-040· 北河chinese-041· 北极chinese-042· 北落师门chinese-043· 鳖chinese-044· 波斯chinese-045· 帛度chinese-046· 参旗chinese-047· 厕chinese-048· 策chinese-049· 常陈chinese-050· 车府chinese-051· 车骑chinese-052· 车肆chinese-053· 刍藁chinese-054· 杵 (箕宿)chinese-055· 杵 (危宿)chinese-056· 长沙 (附轸宿)chinese-057· 传舍chinese-058· 从官 (房宿)chinese-059· 从官 (太微垣)chinese-060· 大角chinese-061· 大理chinese-062· 大陵chinese-064· 帝席chinese-065· 帝座chinese-066· 东咸chinese-067· 斗chinese-068· 顿顽chinese-069· 伐 (附参宿)chinese-070· 罚chinese-071· 飞鱼chinese-072· 坟墓 (附危宿)chinese-073· 鈇钺chinese-074· 鈇锧chinese-075· 扶筐chinese-076· 附白chinese-077· 附路chinese-078· 傅说chinese-079· 盖屋chinese-080· 杠 (附华盖)chinese-081· 阁道chinese-082· 梗河chinese-083· 勾陈chinese-084· 钩钤 (附房宿)chinese-085· 狗chinese-086· 狗国chinese-087· 贯索chinese-088· 爟chinese-089· Guichinese-090· 海山chinese-091· 海石chinese-093· 河鼓chinese-094· 鹤chinese-095· 衡chinese-096· 候chinese-097· 弧矢chinese-098· 斛chinese-099· 虎贲chinese-100· 瓠瓜chinese-101· 华盖chinese-102· 宦者chinese-103· 火鸟chinese-104· 积尸chinese-105· 积尸chinese-106· 积水chinese-107· 积薪chinese-108· 积卒chinese-109· 夹白chinese-110· 建chinese-111· 渐台chinese-112· 键闭chinese-113· 金鱼chinese-114· 进贤chinese-115· 积水chinese-116· 九坎chinese-117· 九卿chinese-118· 九斿chinese-119· 九州殊口chinese-120· 酒旗chinese-121· 臼chinese-122· 卷舌chinese-123· 军井chinese-124· 军南门chinese-125· 军市chinese-126· 糠chinese-127· 亢池chinese-128· 孔雀chinese-129· 哭chinese-130· 库楼chinese-131· 郎将chinese-132· 郎位chinese-133· 老人chinese-134· 雷电chinese-135· 垒壁阵chinese-136· 离宫 (附室宿)chinese-137· 离瑜chinese-138· 离珠chinese-139· 砺石chinese-140· 列肆chinese-141· 灵台chinese-142· 六甲chinese-143· 罗堰chinese-144· 马腹chinese-145· 马尾chinese-146· 蜜蜂chinese-147· 明堂chinese-148· 南船chinese-149· 南河chinese-151· 南门chinese-152· 内厨chinese-153· 内阶chinese-154· 内平chinese-155· 内屏chinese-156· 辇道chinese-157· 鸟喙chinese-158· 农丈人chinese-159· 女床chinese-160· 女史chinese-161· 霹雳chinese-162· Pingchinese-163· 平道chinese-164· 屏chinese-165· 七公chinese-167· 骑官chinese-168· 骑阵将军chinese-169· 泣chinese-171· 青丘chinese-172· 阙丘chinese-173· 人chinese-174· 日chinese-175· 三公 (太微垣)chinese-176· 三公 (紫微垣)chinese-177· 三角形chinese-178· 三师chinese-179· 三台chinese-180· 尚书chinese-181· 少微chinese-182· 蛇腹chinese-183· 蛇首chinese-184· 蛇尾chinese-185· 神宫 (附尾宿)chinese-186· 十二国chinese-187· 十字架chinese-188· 屎chinese-189· 市楼chinese-190· 势chinese-191· 水府chinese-192· 水委chinese-193· 水位chinese-194· 司非chinese-195· 司怪chinese-196· 司禄chinese-197· 司命chinese-198· 司危chinese-199· 四渎chinese-200· 四辅chinese-201· 孙chinese-202· 太阳守chinese-203· 太乙chinese-204· 太子chinese-205· 太尊chinese-206· 螣蛇chinese-207· 天阿chinese-208· 天棓chinese-209· 天弁chinese-210· 天仓chinese-211· 天谗chinese-212· 天厨chinese-213· 天船chinese-214· 天床chinese-215· 天大将军chinese-216· 天桴chinese-217· 天辐chinese-218· 天纲chinese-219· 天高chinese-220· 天钩chinese-221· 天狗chinese-222· 天关chinese-223· 天皇大帝chinese-224· 天潢chinese-225· 天溷chinese-226· 天鸡chinese-227· 天记chinese-228· 天纪chinese-229· 天江chinese-230· 天街chinese-231· 天节chinese-232· 天津chinese-233· 天厩chinese-234· 天狼chinese-235· 天牢chinese-236· 天垒城chinese-237· 天理chinese-238· 天廪chinese-239· 天门chinese-240· 天钱chinese-241· 天枪chinese-242· 天囷chinese-243· 天乳chinese-244· 天社chinese-245· 天田 (角宿)chinese-246· 天田 (牛宿)chinese-247· 天相chinese-248· 天乙chinese-249· 天阴chinese-250· 天庾chinese-251· 天渊chinese-252· 天园chinese-253· 天苑chinese-254· 天籥chinese-255· 天柱chinese-256· 天樽chinese-257· 屠肆chinese-258· 土公chinese-259· 土公吏chinese-260· 土司空chinese-261· 外厨chinese-262· 外屏chinese-263· 王良chinese-265· 文昌chinese-266· 五车chinese-267· 五帝内座chinese-268· 五帝座chinese-269· 五诸侯chinese-270· 五诸侯chinese-271· 西咸chinese-272· 奚仲chinese-273· 咸池chinese-274· 相chinese-275· 小斗chinese-276· 幸臣chinese-277· 虚梁chinese-278· 轩辕chinese-279· 玄戈chinese-280· 钺 (附井宿)chinese-281· 阳门chinese-282· 野鸡chinese-283· 谒者chinese-284· 异雀chinese-285· 阴德chinese-286· 右更chinese-287· 右旗chinese-288· 右摄提chinese-289· 鱼chinese-290· 羽林军chinese-291· 玉井chinese-292· 御女chinese-293· 月chinese-294· 附耳 (附毕宿)chinese-295· 云雨chinese-296· 造父chinese-297· 长垣chinese-298· 丈人chinese-299· 招摇chinese-300· 辅 (附北斗)chinese-301· 折威chinese-302· 阵车chinese-303· 右辖 (附轸宿)chinese-304· 织女chinese-305· 左辖 (附轸宿)chinese-306· 周鼎chinese-307· 诸王chinese-308· 柱 (毕宿)chinese-309· 柱 (角宿)chinese-310· 柱史chinese-311· 子chinese-312· 宗chinese-313· 宗人chinese-314· 宗正chinese-315· 左更chinese-316· 左旗chinese-317· 左摄提chinese-318· 座旗
Mexica (5)
aztec-001· Mamalhuaztli · artwork availableaztec-002· Tianquiztli · artwork availableaztec-003· Citlaltlachtli · artwork availableaztec-004· Xonecuilli · artwork availableaztec-005· Colotl Ixayac · artwork available
Tupi-Guarani (7)
tupi-001· Guirá Nhandutupi-002· Tuivaetupi-003· Tapi'itupi-004· Deertupi-005· Joykexotupi-006· Eixutupi-007· Tapi'i rainhyka
Mission stages
OSIRIS-REx
departure· 2016-09-09T07:00:00.000Z · After departure from Earthearth· 2017-09-22T07:00:00Z · Earth as a gravity-assist waypointarrival· 2018-12-03T16:50:00.000Z · Arrival near Bennuapproach· 2020-10-20T17:50:00.000Z · Later: the close approachencounter· 2020-10-20T21:51:00.000Z · Near touchdown
Apollo 11
departure· 1969-07-16T16:22:13Z · Outbound to the Moonlunar-orbit· 1969-07-19T17:21:50Z · Around the Moondescent· 1969-07-20T20:05:00Z · Eagle descendslanding· 1969-07-20T20:17:40Z · The Sea of Tranquilityascent· 1969-07-21T17:54:00Z · Rejoin Columbiareturn· 1969-07-22T04:55:00Z · The journey homesplashdown· 1969-07-24T16:50:35Z · Back on Earth
New Horizons
departure· 2006-01-20T00:00:00Z · Leaving Earthjupiter· 2007-02-28T05:43:00Z · Jupiter’s boostpluto· 2015-07-14T11:49:00Z · Encounter with Plutoarrokoth· 2019-01-01T05:33:00Z · Arrokoth
Rosetta–Philae
departure· 2004-03-03T00:00:00Z · Rosetta departsearth-1· 2005-03-04T22:09:00Z · Earth as a gravity-assist waypointmars· 2007-02-25T01:57:00Z · Skimming Marsearth-2· 2007-11-13T20:57:00Z · Second Earth flybyearth-3· 2009-11-13T07:45:00Z · Last Earth flybycomet· 2014-08-06T10:00:00Z · Rendezvous with 67Pphilae· 2014-11-12T15:34:00Z · Philae lands
Juno
departure· 2011-08-06T00:00:00Z · On the way to Jupiterearth· 2013-10-09T19:21:00Z · Back past Earthjupiter· 2016-07-05T03:53:00Z · Entering orbit around Jupiter
Hubble
departure· 2026-10-22T00:00:00Z · Hubble around Earthatmosphere· 2026-10-22T00:45:00Z · Above the atmosphereservicing· 2026-10-22T01:35:00Z · A telescope repaired in space
Artemis II
departure· 2026-04-02T02:00:00Z · Earth’s neighborhoodoutbound· 2026-04-03T00:00:00Z · Outbound to the Moonlunar-flyby· 2026-04-06T23:00:00Z · Behind the Moonreturn· 2026-04-08T00:00:00Z · The journey homeapproach· 2026-04-10T21:00:00Z · Approaching Earth
Cassini–Huygens
departure· 1997-10-16T00:00:00Z · After departurevenus-1· 1998-04-26T12:00:00Z · First Venus encountervenus-2· 1999-06-24T12:00:00Z · Back to Venusearth· 1999-08-18T03:28:00Z · Back past Earthjupiter· 2000-12-30T10:12:00Z · Jupitersaturn· 2004-07-01T12:00:00Z · Arrival at Saturn
James Webb
departure· 2021-12-26T00:00:00Z · On the way to L2mirror· 2022-01-08T18:00:00Z · Mirror deployedl2· 2022-01-24T20:00:00Z · Arrival around L2science· 2022-07-12T00:00:00Z · First science images
Travel 2
departure· 1977-08-21T00:00:00Z · After departurejupiter· 1979-07-09T22:29:51Z · Jupitersaturn· 1981-08-26T03:24:57Z · Saturnuranus· 1986-01-24T17:59:47Z · Uranusneptune· 1989-08-25T03:56:36Z · Neptuneinterstellar· 2018-11-05T12:00:00Z · Beyond the heliopauselatest· 2026-10-18T00:00:00Z · Latest included position
Travel 1
departure· 1977-09-06T00:00:00Z · After departurejupiter· 1979-03-05T12:05:26Z · Jupitersaturn· 1980-11-12T23:46:30Z · Saturn et Titanportrait· 1990-02-14T12:00:00Z · Family portraitinterstellar· 2012-08-25T12:00:00Z · Beyond the heliopauselatest· 2026-10-18T00:00:00Z · Latest included position
Experiment parameters and authoring resources
custom-sky· sky · Composer une observation originale / Compose an original observationgravity-earth· orbit · Gravity around Earthvoyager-1· orbit · Voyager 1 · toward interstellar spacevoyager-2· orbit · Voyager 2 · the Grand Tourcassini· orbit · Cassini–Huygens · the road to Saturnwebb· orbit · James Webb · the journey to L2mars-two-moons· orbit · The two moons of Marsearth-artificial-satellites· orbit · Satellites around Eartheclipse-2024-04-08-dallas· sky · Dallas · 04/08/2024eclipse-2026-08-12-burgos· sky · Burgos · 08/12/2026eclipse-2027-08-02-luxor· sky · Luxor · 08/02/2027eclipse-2028-07-22-sydney· sky · Sydney · 07/22/2028eclipse-2030-11-25-gaborone· sky · Gaborone · 11/25/2030polar-trails· sky · Circling the northgalactic-center· sky · At the heart of the Milky Waysunset-earth· sky · Golden hourmoon-earth· sky · Earth from the Moonmars-sun· sky · The Sun from Marsmercury-sun· sky · Under Mercury’s Sunmoon-farside· sky · The Moon’s far sideparis-sky· sky · The sky over Parisequator-sky· sky · Beneath the equatorsouthern-sky· sky · The southern skysystem-moon· orbit · Our Earth–Moon pairsystem-saturn· orbit · Saturnsystem-jupiter· orbit · Jupitersystem-mars· orbit · Marssystem-uranus· orbit · Uranussystem-neptune· orbit · Neptunesystem-sun· orbit · Our starlearn-phases· learn · Why the Moon changes shapedefault: Position angulaire : 0° nouvelle Moon, 90° premier quartier, 180° pleine Moon (schéma, hors éclipse) [0…360]
learn-seasons· learn · Two hemispheres, two seasonsdefault: Axial tilt [0…45]
learn-eclipses· learn · Why isn’t there an eclipse every month?default: Distance from node [0…90]
compare-worlds· compare · A family of very different sizesplanet-mercury· orbit · Mercuryplanet-venus· orbit · Venusplanet-earth· orbit · Earthstellar-orion· stellar · Behind Orion’s outlinestellar-parallax· stellar · Near and far: stellar parallaxstellar-sirius· stellar · Find the Sun from Siriusmoon-earth-eclipse-2025· sky · A solar eclipse from the Moonphobos-mars-horizon· sky · Mars on the horizon of Phoboseuropa-jupiter-horizon· sky · Jupiter from Europa’s iceconstellation-art· sky · Orion takes shapesky-chinese· sky · Beidou, the Northern Dippersky-mexica· sky · Tianquiztli, the celestial marketsky-tupi· sky · The Old Man in the skylearn-libration· learn · The Moon reveals morelearn-assist· learn · Gaining speed from a planetplanet: Planet speed · km/s [0…30]relative: Velocity relative lointaine · km/s [2…20]turn: Deflection · degrees [-140…140]
stellar-relativity· stellar · Travel at 90% of light speedjupiter-limb· orbit · Jupiter · the cloud limblearn-compact-systems· learn · Stars around black holesorbit: Position along orbit barycentrique [0…1000]
learn-variable-stars· learn · Stars keep the beatphase: Phase Hipparcos [0…1000]
learn-expansion-universe· learn · Big Bang, expansion and Hubble’s lawage: Âge cosmique [0…1000]
learn-andromeda· learn · Andromeda: a constellation, a galaxylearn-gravity· learn · The gravitational fieldmass: Mass · Earth masses [0.1…10]radius: Distance from center · Earth radii [1…10]
learn-transfer· learn · Traveling from one orbit to anotherdestination: Arrival orbit · AU [1.1…10]progress: Journey progress · % [0…100]
learn-heliosphere· learn · Where does the Solar System end?learn-day· learn · Day and nightlearn-light· learn · Looking far away means looking into the pastdistance: Distance · UA [0.01…40]progress: Progression aller-retour · % [0…100]
learn-orbit· learn · Why a planet does not falla: Demi-grand axe · UA [0.4…10]e: Eccentricity [0…0.8]phase: Progress along orbit · % [0…100]
learn-tides· learn · Tidesdistance: Distance · multiple of current distance [0.5…3]
learn-retrograde· learn · The apparent backward motion of planetslearn-rings· learn · Rings and the Roche limitlearn-resonance· learn · Orbital resonanceslearn-precession· learn · Axial precessionlearn-lagrange· learn · Lagrange pointslearn-relativity· learn · Mercury’s precessioncomet-halley· orbit · Halley · the 1986 passageasteroid-bennu· orbit · Bennu · seconds to collect billions of yearsasteroid-ryugu· orbit · Ryugu · bringing a dark world homeasteroid-itokawa· orbit · Itokawa · dust connects two worldsasteroid-eros· orbit · Eros · the orbiter that survived landingasteroid-toutatis· orbit · Toutatis · a tumbling worldasteroid-apophis· orbit · Apophis · Earth bends the routeasteroid-duende· orbit · Duende · below geostationary altitudeosiris-rex· orbit · OSIRIS-RExlearn-compare· learn · Comparing sizesapollo-11· orbit · Apollo 11new-horizons· orbit · New Horizonsrosetta· orbit · Rosetta–Philaejuno· orbit · Junohubble· orbit · Hubbleartemis-ii· orbit · Artemis IIlibration-earth-from-moon· sky · Earth sways in the lunar skylibration-moon-from-earth· sky · The Moon beyond the same facesystem-kepler-16· extrasolar · Kepler-16 · Two suns, one planetsystem-kepler-47· extrasolar · Kepler-47 · Three worlds, two sunssystem-trappist-1· extrasolar · TRAPPIST-1 · Seven rocky worldssystem-wasp-76· extrasolar · WASP-76 · Iron rainsystem-55-cancri· extrasolar · 55 Cancri · A magma worldsystem-hd-80606· extrasolar · HD 80606 · An extreme orbitgalaxies-2mrs· galaxies · Among twenty thousand galaxieskepler-16-follow-a· extrasolar · Kepler-16 · Beside star Atrappist-1-follow-e· extrasolar · TRAPPIST-1 e · A planet and its stargalaxies-local-group· galaxies · The Local Group · Five landmarksgalaxies-ngc4486b-field· galaxies · Around NGC 4486B · A galaxy fieldsystem-hd-196885· extrasolar · HD 196885 · A planet travels with its starstellar-delta-cephei· extrasolar · Delta Cephei · a variable starquasar-3c273· galaxies · 3C 273 · an active nucleusblack-hole-sgr-a· extrasolar · Sagittarius A* · bent lightblack-hole-m87· extrasolar · M87* · bent lightsystem-sgr-a-stars· extrasolar · Sagittarius A* · orbiting starssystem-gaia-bh1· extrasolar · Gaia BH1 · an invisible companionstellar-eta-aquilae· extrasolar · Eta Aquilae · a variable starstellar-zeta-geminorum· extrasolar · Zeta Geminorum · a variable starsystem-sgr-a-s2· extrasolar · S2 · close to Sagittarius A*evolution-solar· extrasolar · The life of the Sunevolution-red-dwarf· extrasolar · Proxima, a long lifeevolution-supernova· extrasolar · Betelgeuse and the supernovaevolution-collapse· extrasolar · Rigel and stellar collapsecosmic-expansion-journey· galaxies · The expanding Universeconstellation-Aql· sky · Aquilaconstellation-And· sky · Andromedaconstellation-Scl· sky · Sculptorconstellation-Ara· sky · Araconstellation-Lib· sky · Libraconstellation-Cet· sky · Cetusconstellation-Ari· sky · Ariesconstellation-Sct· sky · Scutumconstellation-Pyx· sky · Pyxisconstellation-Boo· sky · Boötesconstellation-Cae· sky · Caelumconstellation-Cha· sky · Chamaeleonconstellation-Cnc· sky · Cancerconstellation-Cap· sky · Capricorneconstellation-Car· sky · Carinaconstellation-Cas· sky · Cassiopeiaconstellation-Cen· sky · Centaurusconstellation-Cep· sky · Cepheusconstellation-Com· sky · Coma Berenicesconstellation-CVn· sky · Canes Venaticiconstellation-Aur· sky · Aurigaconstellation-Col· sky · Columbaconstellation-Cir· sky · Circinusconstellation-Crt· sky · Craterconstellation-CrA· sky · Corona Australisconstellation-CrB· sky · Corona Borealisconstellation-Crv· sky · Corvusconstellation-Cru· sky · Cruxconstellation-Cyg· sky · Cygnusconstellation-Del· sky · Delphinusconstellation-Dor· sky · Doradoconstellation-Dra· sky · Dracoconstellation-Nor· sky · Normaconstellation-Eri· sky · Eridanusconstellation-Sge· sky · Sagittaconstellation-For· sky · Fornaxconstellation-Gem· sky · Geminiconstellation-Cam· sky · Camelopardalisconstellation-CMa· sky · Canis Majorconstellation-UMa· sky · Big Dipperconstellation-Gru· sky · Grusconstellation-Her· sky · Herculesconstellation-Hor· sky · Horologiumconstellation-Hya· sky · Hydraconstellation-Hyi· sky · Hydrusconstellation-Ind· sky · Indusconstellation-Lac· sky · Lacertaconstellation-Mon· sky · Monocerosconstellation-Lep· sky · Lepusconstellation-Leo· sky · Leoconstellation-Lup· sky · Lupusconstellation-Lyn· sky · Lynxconstellation-Lyr· sky · Lyraconstellation-Ant· sky · Antliaconstellation-Mic· sky · Microscopiumconstellation-Mus· sky · Muscaconstellation-Oct· sky · Octansconstellation-Aps· sky · Apusconstellation-Oph· sky · Ophiuchusconstellation-Ori· sky · Orionconstellation-Pav· sky · Pavoconstellation-Peg· sky · Pegasusconstellation-Pic· sky · Pictorconstellation-Per· sky · Perseusconstellation-Equ· sky · Equuleusconstellation-CMi· sky · Canis Minorconstellation-LMi· sky · Leo Minorconstellation-Vul· sky · Vulpeculaconstellation-UMi· sky · Ursa Minorconstellation-Phe· sky · Phoenixconstellation-Psc· sky · Piscesconstellation-PsA· sky · Piscis Austrinusconstellation-Vol· sky · Volansconstellation-Pup· sky · Puppisconstellation-Ret· sky · Reticulumconstellation-Sgr· sky · Sagittariusconstellation-Sco· sky · Scorpiusconstellation-Ser· sky · Serpensconstellation-Sex· sky · Sextansconstellation-Men· sky · Mensaconstellation-Tau· sky · Taurusconstellation-Tel· sky · Telescopiumconstellation-Tuc· sky · Tucanaconstellation-Tri· sky · Triangulumconstellation-TrA· sky · Triangulum Australeconstellation-Aqr· sky · Aquariusconstellation-Vir· sky · Virgoconstellation-Vel· sky · Velaconstellation-chinese-001· sky · 毕宿constellation-chinese-002· sky · 壁宿constellation-chinese-003· sky · 参宿constellation-chinese-004· sky · 氐宿constellation-chinese-005· sky · 斗宿constellation-chinese-006· sky · 房宿constellation-chinese-007· sky · 鬼宿constellation-chinese-008· sky · 箕宿constellation-chinese-009· sky · 角宿constellation-chinese-010· sky · 井宿constellation-chinese-011· sky · 亢宿constellation-chinese-012· sky · 奎宿constellation-chinese-013· sky · 柳宿constellation-chinese-014· sky · 娄宿constellation-chinese-015· sky · 昴宿constellation-chinese-016· sky · 牛宿constellation-chinese-017· sky · 女宿constellation-chinese-018· sky · 室宿constellation-chinese-019· sky · 太微右垣constellation-chinese-020· sky · 太微左垣constellation-chinese-021· sky · 天市右垣constellation-chinese-022· sky · 天市左垣constellation-chinese-023· sky · 危宿constellation-chinese-024· sky · 尾宿constellation-chinese-025· sky · 胃宿constellation-chinese-026· sky · 心宿constellation-chinese-027· sky · Xing Xiuconstellation-chinese-028· sky · 虚宿constellation-chinese-029· sky · 翼宿constellation-chinese-030· sky · 张宿constellation-chinese-031· sky · 轸宿constellation-chinese-032· sky · 紫微右垣constellation-chinese-033· sky · 紫微左垣constellation-chinese-034· sky · 觜宿constellation-chinese-035· sky · 八谷constellation-chinese-036· sky · 八魁constellation-chinese-037· sky · 败瓜constellation-chinese-038· sky · 败臼constellation-chinese-039· sky · 北斗constellation-chinese-040· sky · 北河constellation-chinese-041· sky · 北极constellation-chinese-042· sky · 北落师门constellation-chinese-043· sky · 鳖constellation-chinese-044· sky · 波斯constellation-chinese-045· sky · 帛度constellation-chinese-046· sky · 参旗constellation-chinese-047· sky · 厕constellation-chinese-048· sky · 策constellation-chinese-049· sky · 常陈constellation-chinese-050· sky · 车府constellation-chinese-051· sky · 车骑constellation-chinese-052· sky · 车肆constellation-chinese-053· sky · 刍藁constellation-chinese-054· sky · 杵 (箕宿)constellation-chinese-055· sky · 杵 (危宿)constellation-chinese-056· sky · 长沙 (附轸宿)constellation-chinese-057· sky · 传舍constellation-chinese-058· sky · 从官 (房宿)constellation-chinese-059· sky · 从官 (太微垣)constellation-chinese-060· sky · 大角constellation-chinese-061· sky · 大理constellation-chinese-062· sky · 大陵constellation-chinese-064· sky · 帝席constellation-chinese-065· sky · 帝座constellation-chinese-066· sky · 东咸constellation-chinese-067· sky · 斗constellation-chinese-068· sky · 顿顽constellation-chinese-069· sky · 伐 (附参宿)constellation-chinese-070· sky · 罚constellation-chinese-071· sky · 飞鱼constellation-chinese-072· sky · 坟墓 (附危宿)constellation-chinese-073· sky · 鈇钺constellation-chinese-074· sky · 鈇锧constellation-chinese-075· sky · 扶筐constellation-chinese-076· sky · 附白constellation-chinese-077· sky · 附路constellation-chinese-078· sky · 傅说constellation-chinese-079· sky · 盖屋constellation-chinese-080· sky · 杠 (附华盖)constellation-chinese-081· sky · 阁道constellation-chinese-082· sky · 梗河constellation-chinese-083· sky · 勾陈constellation-chinese-084· sky · 钩钤 (附房宿)constellation-chinese-085· sky · 狗constellation-chinese-086· sky · 狗国constellation-chinese-087· sky · 贯索constellation-chinese-088· sky · 爟constellation-chinese-089· sky · Guiconstellation-chinese-090· sky · 海山constellation-chinese-091· sky · 海石constellation-chinese-093· sky · 河鼓constellation-chinese-094· sky · 鹤constellation-chinese-095· sky · 衡constellation-chinese-096· sky · 候constellation-chinese-097· sky · 弧矢constellation-chinese-098· sky · 斛constellation-chinese-099· sky · 虎贲constellation-chinese-100· sky · 瓠瓜constellation-chinese-101· sky · 华盖constellation-chinese-102· sky · 宦者constellation-chinese-103· sky · 火鸟constellation-chinese-104· sky · 积尸constellation-chinese-105· sky · 积尸constellation-chinese-106· sky · 积水constellation-chinese-107· sky · 积薪constellation-chinese-108· sky · 积卒constellation-chinese-109· sky · 夹白constellation-chinese-110· sky · 建constellation-chinese-111· sky · 渐台constellation-chinese-112· sky · 键闭constellation-chinese-113· sky · 金鱼constellation-chinese-114· sky · 进贤constellation-chinese-115· sky · 积水constellation-chinese-116· sky · 九坎constellation-chinese-117· sky · 九卿constellation-chinese-118· sky · 九斿constellation-chinese-119· sky · 九州殊口constellation-chinese-120· sky · 酒旗constellation-chinese-121· sky · 臼constellation-chinese-122· sky · 卷舌constellation-chinese-123· sky · 军井constellation-chinese-124· sky · 军南门constellation-chinese-125· sky · 军市constellation-chinese-126· sky · 糠constellation-chinese-127· sky · 亢池constellation-chinese-128· sky · 孔雀constellation-chinese-129· sky · 哭constellation-chinese-130· sky · 库楼constellation-chinese-131· sky · 郎将constellation-chinese-132· sky · 郎位constellation-chinese-133· sky · 老人constellation-chinese-134· sky · 雷电constellation-chinese-135· sky · 垒壁阵constellation-chinese-136· sky · 离宫 (附室宿)constellation-chinese-137· sky · 离瑜constellation-chinese-138· sky · 离珠constellation-chinese-139· sky · 砺石constellation-chinese-140· sky · 列肆constellation-chinese-141· sky · 灵台constellation-chinese-142· sky · 六甲constellation-chinese-143· sky · 罗堰constellation-chinese-144· sky · 马腹constellation-chinese-145· sky · 马尾constellation-chinese-146· sky · 蜜蜂constellation-chinese-147· sky · 明堂constellation-chinese-148· sky · 南船constellation-chinese-149· sky · 南河constellation-chinese-151· sky · 南门constellation-chinese-152· sky · 内厨constellation-chinese-153· sky · 内阶constellation-chinese-154· sky · 内平constellation-chinese-155· sky · 内屏constellation-chinese-156· sky · 辇道constellation-chinese-157· sky · 鸟喙constellation-chinese-158· sky · 农丈人constellation-chinese-159· sky · 女床constellation-chinese-160· sky · 女史constellation-chinese-161· sky · 霹雳constellation-chinese-162· sky · Pingconstellation-chinese-163· sky · 平道constellation-chinese-164· sky · 屏constellation-chinese-165· sky · 七公constellation-chinese-167· sky · 骑官constellation-chinese-168· sky · 骑阵将军constellation-chinese-169· sky · 泣constellation-chinese-171· sky · 青丘constellation-chinese-172· sky · 阙丘constellation-chinese-173· sky · 人constellation-chinese-174· sky · 日constellation-chinese-175· sky · 三公 (太微垣)constellation-chinese-176· sky · 三公 (紫微垣)constellation-chinese-177· sky · 三角形constellation-chinese-178· sky · 三师constellation-chinese-179· sky · 三台constellation-chinese-180· sky · 尚书constellation-chinese-181· sky · 少微constellation-chinese-182· sky · 蛇腹constellation-chinese-183· sky · 蛇首constellation-chinese-184· sky · 蛇尾constellation-chinese-185· sky · 神宫 (附尾宿)constellation-chinese-186· sky · 十二国constellation-chinese-187· sky · 十字架constellation-chinese-188· sky · 屎constellation-chinese-189· sky · 市楼constellation-chinese-190· sky · 势constellation-chinese-191· sky · 水府constellation-chinese-192· sky · 水委constellation-chinese-193· sky · 水位constellation-chinese-194· sky · 司非constellation-chinese-195· sky · 司怪constellation-chinese-196· sky · 司禄constellation-chinese-197· sky · 司命constellation-chinese-198· sky · 司危constellation-chinese-199· sky · 四渎constellation-chinese-200· sky · 四辅constellation-chinese-201· sky · 孙constellation-chinese-202· sky · 太阳守constellation-chinese-203· sky · 太乙constellation-chinese-204· sky · 太子constellation-chinese-205· sky · 太尊constellation-chinese-206· sky · 螣蛇constellation-chinese-207· sky · 天阿constellation-chinese-208· sky · 天棓constellation-chinese-209· sky · 天弁constellation-chinese-210· sky · 天仓constellation-chinese-211· sky · 天谗constellation-chinese-212· sky · 天厨constellation-chinese-213· sky · 天船constellation-chinese-214· sky · 天床constellation-chinese-215· sky · 天大将军constellation-chinese-216· sky · 天桴constellation-chinese-217· sky · 天辐constellation-chinese-218· sky · 天纲constellation-chinese-219· sky · 天高constellation-chinese-220· sky · 天钩constellation-chinese-221· sky · 天狗constellation-chinese-222· sky · 天关constellation-chinese-223· sky · 天皇大帝constellation-chinese-224· sky · 天潢constellation-chinese-225· sky · 天溷constellation-chinese-226· sky · 天鸡constellation-chinese-227· sky · 天记constellation-chinese-228· sky · 天纪constellation-chinese-229· sky · 天江constellation-chinese-230· sky · 天街constellation-chinese-231· sky · 天节constellation-chinese-232· sky · 天津constellation-chinese-233· sky · 天厩constellation-chinese-234· sky · 天狼constellation-chinese-235· sky · 天牢constellation-chinese-236· sky · 天垒城constellation-chinese-237· sky · 天理constellation-chinese-238· sky · 天廪constellation-chinese-239· sky · 天门constellation-chinese-240· sky · 天钱constellation-chinese-241· sky · 天枪constellation-chinese-242· sky · 天囷constellation-chinese-243· sky · 天乳constellation-chinese-244· sky · 天社constellation-chinese-245· sky · 天田 (角宿)constellation-chinese-246· sky · 天田 (牛宿)constellation-chinese-247· sky · 天相constellation-chinese-248· sky · 天乙constellation-chinese-249· sky · 天阴constellation-chinese-250· sky · 天庾constellation-chinese-251· sky · 天渊constellation-chinese-252· sky · 天园constellation-chinese-253· sky · 天苑constellation-chinese-254· sky · 天籥constellation-chinese-255· sky · 天柱constellation-chinese-256· sky · 天樽constellation-chinese-257· sky · 屠肆constellation-chinese-258· sky · 土公constellation-chinese-259· sky · 土公吏constellation-chinese-260· sky · 土司空constellation-chinese-261· sky · 外厨constellation-chinese-262· sky · 外屏constellation-chinese-263· sky · 王良constellation-chinese-265· sky · 文昌constellation-chinese-266· sky · 五车constellation-chinese-267· sky · 五帝内座constellation-chinese-268· sky · 五帝座constellation-chinese-269· sky · 五诸侯constellation-chinese-270· sky · 五诸侯constellation-chinese-271· sky · 西咸constellation-chinese-272· sky · 奚仲constellation-chinese-273· sky · 咸池constellation-chinese-274· sky · 相constellation-chinese-275· sky · 小斗constellation-chinese-276· sky · 幸臣constellation-chinese-277· sky · 虚梁constellation-chinese-278· sky · 轩辕constellation-chinese-279· sky · 玄戈constellation-chinese-280· sky · 钺 (附井宿)constellation-chinese-281· sky · 阳门constellation-chinese-282· sky · 野鸡constellation-chinese-283· sky · 谒者constellation-chinese-284· sky · 异雀constellation-chinese-285· sky · 阴德constellation-chinese-286· sky · 右更constellation-chinese-287· sky · 右旗constellation-chinese-288· sky · 右摄提constellation-chinese-289· sky · 鱼constellation-chinese-290· sky · 羽林军constellation-chinese-291· sky · 玉井constellation-chinese-292· sky · 御女constellation-chinese-293· sky · 月constellation-chinese-294· sky · 附耳 (附毕宿)constellation-chinese-295· sky · 云雨constellation-chinese-296· sky · 造父constellation-chinese-297· sky · 长垣constellation-chinese-298· sky · 丈人constellation-chinese-299· sky · 招摇constellation-chinese-300· sky · 辅 (附北斗)constellation-chinese-301· sky · 折威constellation-chinese-302· sky · 阵车constellation-chinese-303· sky · 右辖 (附轸宿)constellation-chinese-304· sky · 织女constellation-chinese-305· sky · 左辖 (附轸宿)constellation-chinese-306· sky · 周鼎constellation-chinese-307· sky · 诸王constellation-chinese-308· sky · 柱 (毕宿)constellation-chinese-309· sky · 柱 (角宿)constellation-chinese-310· sky · 柱史constellation-chinese-311· sky · 子constellation-chinese-312· sky · 宗constellation-chinese-313· sky · 宗人constellation-chinese-314· sky · 宗正constellation-chinese-315· sky · 左更constellation-chinese-316· sky · 左旗constellation-chinese-317· sky · 左摄提constellation-chinese-318· sky · 座旗constellation-aztec-001· sky · Mamalhuaztliconstellation-aztec-002· sky · Tianquiztliconstellation-aztec-003· sky · Citlaltlachtliconstellation-aztec-004· sky · Xonecuilliconstellation-aztec-005· sky · Colotl Ixayacconstellation-tupi-001· sky · Guirá Nhanduconstellation-tupi-002· sky · Tuivaeconstellation-tupi-003· sky · Tapi'iconstellation-tupi-004· sky · Deerconstellation-tupi-005· sky · Joykexoconstellation-tupi-006· sky · Eixuconstellation-tupi-007· sky · Tapi'i rainhykalesson-compact-systems· learn · Stars around black holesorbit: Position along orbit barycentrique [0…1000]
lesson-variable-stars· learn · Stars keep the beatphase: Phase Hipparcos [0…1000]
lesson-expansion-universe· learn · Big Bang, expansion and Hubble’s lawage: Âge cosmique [0…1000]
lesson-andromeda· learn · Andromeda: a constellation, a galaxylesson-gravity· learn · The gravitational fieldmass: Mass · Earth masses [0.1…10]radius: Distance from center · Earth radii [1…10]
lesson-assist· learn · Gravity assistplanet: Planet speed · km/s [0…30]relative: Velocity relative lointaine · km/s [2…20]turn: Deflection · degrees [-140…140]
lesson-transfer· learn · Traveling from one orbit to anotherdestination: Arrival orbit · AU [1.1…10]progress: Journey progress · % [0…100]
lesson-heliosphere· learn · Where does the Solar System end?lesson-compare· learn · Comparing sizeslesson-day· learn · Day and nightlesson-phases· learn · The phases of the Moondefault: Position angulaire : 0° nouvelle Moon, 90° premier quartier, 180° pleine Moon (schéma, hors éclipse) [0…360]
lesson-seasons· learn · The seasonsdefault: Axial tilt [0…45]
lesson-eclipses· learn · Eclipsesdefault: Distance from node [0…90]
lesson-sky· learn · Why the sky seems to turnlesson-light· learn · Looking far away means looking into the pastdistance: Distance · UA [0.01…40]progress: Progression aller-retour · % [0…100]
lesson-orbit· learn · Why a planet does not falla: Demi-grand axe · UA [0.4…10]e: Eccentricity [0…0.8]phase: Progress along orbit · % [0…100]
lesson-kepler· learn · Kepler’s three lawsa: Demi-grand axe · UA [0.4…10]e: Eccentricity [0…0.8]phase: Progress along orbit · % [0…100]
lesson-tides· learn · Tidesdistance: Distance · multiple of current distance [0.5…3]
lesson-lock· learn · Why the Moon shows the same facephase: Progress along orbit · % [0…100]rate: Rotations per orbit [0…2]
lesson-retrograde· learn · The apparent backward motion of planetslesson-inclination· learn · Axis and orbit: two different tiltslesson-rings· learn · Rings and the Roche limitlesson-resonance· learn · Orbital resonanceslesson-heating· learn · Tidal heatinglesson-libration· learn · The Moon’s librationlesson-precession· learn · Axial precessionlesson-lagrange· learn · Lagrange pointslesson-relativity· learn · Mercury’s precession
Scope and maintenance
Cross-cutting functions were reviewed against module code; inventories are regenerated from catalogues on every build. This document aims for detailed coverage without treating each catalogue object as a separate feature. Engine or interface changes must update the relevant descriptions. Cosmic views are evolving in a separate workstream.