AstroLabASTROLAB COLLECTIONS
Understand what you see
Why the Moon changes shape
An experiment with light.
Two hemispheres, two seasons
Change Earth’s tilt.
A family of very different sizes
From the Sun to the Moon, at the same scale.
Near and far: stellar parallax
Turn the wheel: Alpha Centauri shifts farther.
Big Bang, expansion and Hubble’s law
Understand the measurements and explore the phenomenon.
Gaining speed from a planet
Follow a flyby and compare velocities in two reference frames.
Gravity around Earth
A grid for exploring the field
Stars keep the beat
Understand the measurements and explore the phenomenon.
Why isn’t there an eclipse every month?
A slightly tilted orbit.
Stars around black holes
Understand the measurements and explore the phenomenon.
The Moon reveals more
Understand libration with an animation and surface markers.
Travel at 90% of light speed
Aberration, colours and two clocks.
Traveling from one orbit to another
An ellipse, two burns, one rendezvous
Lagrange points
Equilibria in a rotating frame
Where does the Solar System end?
Different boundaries tell different stories
Day and night
Earth turns beneath the light
The apparent backward motion of planets
An overtaking effect
Axial precession
A top with a very long period
Rings and the Roche limit
Debris in orbit
Orbital resonances
Regular gravitational encounters
Mercury’s precession
When Newton’s laws are not quite enough
Looking far away means looking into the past
Light travels at a finite speed
Andromeda: a constellation, a galaxy
A shared direction, very different distances
The gravitational field
What makes objects fall and paths curve
Why a planet does not fall
A fall that continues around the Sun
Tides
Gravity does not pull equally everywhere
Comparing sizes
A giant star, tiny planets