AstroLab
Expansion is not an explosion
From the young Universe to 25 billion years: see distances grow without confusing expansion with camera motion.
1 min 30 s · Interactive subtitled film
Takeaway: Expansion increases distances between unbound regions without an explosion centre.
Useful background
Galaxy, gravity and light travel time.
Why do bound galaxies not expand with this model?
The journey · 3 chapters
- From the Big Bang to expanding space
- No special centre
- Stretched light
Why explore it?
French and English subtitles. Adjustable playback speed, free navigation and sequence reframing. AI-assisted editorial review.