Across
- 1. the place where we live
- 4. all existing matter and things as a whole
- 6. people who are trained to fly in space and do experiments
- 9. a vast cosmic islands of stars, gas, dust, and dark matter held together by gravity.
- 10. a place where gravity is so strong that no matter can escape
- 11. can be used by people on the ground to look at stars far away
- 14. get away or run away from something
- 16. objects that fly in space and orbits around the sun
- 18. a domed building in which images of stars, planets, and constellations are projected for public entertainment or education.
Down
- 2. people who study astronomy
- 3. the leader of a team
- 5. we can ride in this thing to space
- 7. something that comes out of us when our skin is cut or hurt
- 8. a place where there is only sand, and very little trees
- 12. we can see it in the sky at night
- 13. the galaxy in which we live in
- 15. life that is not on earth
- 17. water, oil, glue, and things that can flow like water