Across
- 2. system of billions of stars held by gravity
- 4. red planet
- 7. a space rock
- 8. hottest planet
- 9. biggest planet
Down
- 1. looks like a planet, but it is not.
- 3. where planets, stars, other objects are found
- 5. luminous point in the night sky
- 6. a ball of mostly ice that moves around in space