Across
- 2. closest star to the earth
- 3. what is it called when a star explodes
- 4. tallest mountain on mars
- 8. nearest star (apart from the sun)
- 10. how many planets are there in our solar system
- 11. the name of our galaxy
- 12. the eighth planet from the sun also a god's name
Down
- 1. what separates the gas giants from the rocky planets
- 5. what orbits the earth
- 6. is now called a dwarf planet
- 7. first man in space
- 9. first man on the moon