Across
- 3. Earth and stars are part of the ______.
- 8. How much matter is in an object.
- 13. A laboratory in space.
- 15. Also known as 1.5 hours.
- 19. The galaxy that includes the solar system.
- 20. Nothing not even light can escape this.
- 21. A group of stars.
- 22. The planet we are living on today.
- 23. Something that orbits a planet or a star.
Down
- 1. The distance light travels in one year.
- 2. The third brightest star in our solar system, and the closest star to us.
- 4. Can be known as natural gas.
- 5. A force that keeps us from floating off into space.
- 6. A large telescope in space.
- 7. A path that an object takes around another in space.
- 9. Twinkle twinkle little _________.
- 10. A ring of icy objects around the sun.
- 11. A moose has more _____ than a dog.
- 12. A spiral galaxy that is 2.5 light years away.
- 14. Mars, Earth, and Jupiter, are examples of this.
- 16. Can be planetary or stellar of this.
- 17. A space probe made by Nasa.
- 18. The pole star.
- 23. The largest planet in the solar system.