Across
- 3. our galaxy
- 5. gravity is so strong that nothing can ever get out
- 7. other____ like earth
- 10. every______minutes the ISS orbits the earth
- 12. has living creatures
- 14. big dipper, little dipper
- 16. Our sun is a giant____
- 17. keeps us on the ground
- 18. closest galaxy to ours
Down
- 1. space probe launched by NASA in 1977
- 2. orbiting around earth
- 4. a constellation in space
- 6. Can either be a stellar or a planetary
- 8. 186,000 miles long
- 9. a satellite orbiting earth
- 11. how heavy something is
- 13. H2
- 15. all the planets_____ around the sun
- 18. triple star system