Across
- 3. a force that pulls objects together
- 4. mass packed into a tiny volume
- 6. our galaxy
- 8. where we live
- 11. a gas with diatomic molecules
- 12. a large cloud of gas and dust
- 13. minutes the amount of time it take satellites to orbit earth
- 14. the amount of matter inside of an object
- 18. spacestation a permanently crewed satellite in space
- 20. a pattern of stars
- 21. the natural tendency of objects in motion
- 22. a space prob that we launched into space to orbit the earth
Down
- 1. year the distance light travels in one year
- 2. a star in the little dipper
- 3. massive collection of gas planets dust and dark matter
- 5. a celestial body that orbits a star
- 7. one a space prob that left earth to discover other galaxy's
- 9. triple star system located 4.37 light years from earth
- 10. a space based observatory
- 15. a giant ball of gas
- 16. a region of the solar system located beyond the orbit of Neptune
- 17. a constellation in the Andromeda Galaxy
- 19. a repeating path that a planet makes