Stars, Galaxies & Black Holes
Level 3 · Learn It
1. Learn It
2. Try It
3. Quiz Me
Stars are huge glowing balls of hot gas. Our Sun is a medium-sized star.
A galaxy is a giant family of stars. Ours is the Milky Way, with over 100 billion stars.
A black hole has gravity so strong that light cannot escape it.
Ready? Let's try one together — I'll explain every answer.