Across
- 1. The most common type of galaxy shape
- 3. The force that holds planets in orbit of their star
- 5. Moves at 186,000 mi/sec- it's the fastest thing that exists!
- 8. Large gaseous bodies that emit heat and light
- 10. The type of EM waves with the least energy
- 11. The _____ System is a central star and its orbiting space objects.
- 13. An egg shaped galaxy containing older stars
- 15. Gamma waves have high energy due to their high ______________.
Down
- 2. The distance light can travel in one year
- 4. Galaxy type with no structure or arms
- 6. We are lucky that the ______ blocks most harmful types of solar radiation from reaching Earth's surface.
- 7. All of the matter and energy that exists
- 9. A large collection of stars, gases, and dust held together by gravity
- 12. All stars and our sun give off _______ types of EM radiation.
- 14. The distance between the Earth and the Sun