Across
- 3. the apparent change in wave frequency as an energy source moves towards or away from the observer
- 6. a system of billions of stars
- 9. the tremendously powerful explosion of an incredible dense mass about 15-20 billion years ago that produced the expanding universe that exists today.
- 10. includes our sun, the nine planets and many moons
Down
- 1. as a source of visible light moves away from observer
- 2. something in space such as stars or planets
- 4. all existing matter space considered a whole cosmos
- 5. relative brightness of something
- 7. the north star which is located almost directly above earths geographic north pole
- 8. a fixed luminous point in the night sky that is large