Across
- 4. an explosion of a star
- 5. a small object in outer space
- 6. a group of stars, rocks and dusts
- 7. a person who travels in space
- 9. a vehicle that goes into space
- 11. an object that orbits the sun
- 12. speed of_
Down
- 1. a group of stars that are given names
- 2. a minor planet or rock that orbits the sun
- 3. our galaxy
- 8. an instrument that helps see things far away
- 10. recently named a dwarf planet