Across
- 1. a dwarf planet that is very far away
- 3. one of Pluto's moons
- 5. this is a ball of dust, ice and rock
- 8. a star that is about 4.5 billion years old
- 9. the name of one of Mars 2 moons
- 14. comet you might see this object in 2061
- 15. a large group of stars, dust and gas
- 16. holds a galaxy together & we float without it
- 17. mars is the planet that is half the size of this
- 19. way all the stars humans can see are here
- 20. a spacecraft that travels through space
- 21. giant the sun will turn into this
- 22. the Red Planet
- 24. one of Jupiter's moons
- 25. some moons are shaped like these
Down
- 2. comets usually have ____ tails
- 4. a person who travels beyond earth
- 6. an object in space that travels around a planet
- 7. the small bright body in the head of a comet
- 10. a robot that can take pictures and collect stuff
- 11. Mars is this to Earth
- 12. this is a minor planet
- 13. Pluto has the largest one of these
- 18. a vehicle designed to fly in outer space
- 22. and _____ are the 2 planets without any moons
- 23. this is an exploding ball of burning gas