Across
- 2. shape or forming a ring shape
- 5. The compactness of matter
- 9. The path one object takes around another
- 12. A small, frozen mass of dust and gas revolving around the sun
- 14. A cloud of gas and dust
- 15. was the first international space station
- 17. The outermost part of the Sun's atmosphere
- 19. The lighter part of a shadow found on the shadow's edge
- 20. The path one object takes around another
Down
- 1. A group of stars, gas and dust held together by gravity.
- 3. Point directly above your head in the night sky
- 4. Study of the Earth using Physics
- 6. 3.26 light years
- 7. bright surface of the Sun
- 8. shuttle lifting off from a launch pad
- 10. A very small particle with no mass or charge
- 11. An object moving around a star
- 13. Ancient instrument used to tell time
- 16. Period between new moons. 29 days 12 hours 44 minutes.
- 18. The dark inner part of a sunspot, or shadow