Universe size comparison in 3D: see how big planets, stars, black holes and galaxies really are, side by side at true scale.
From the Moon to the Sun, every object drawn at its real size, so you finally feel how big things are. Earth beside the Sun. A star beside a black hole. Slide between them and see the real ratio.
Supernovae, black-hole mergers, pulsars and more, built step by step from real physics and measured numbers.