Across
- 3. , A Celestial body orbiting around a star
- 6. Years , A unit of length in astronomy equal to the distance that light travels in one year
- 8. , The Brightness of a Celestial Object
- 11. , Was Created By the Big Bang
Down
- 1. , Billions Of Stars Held Together By Gravity
- 2. A measurement of how hot or cool an object is
- 4. System , A sun and planets held together by attraction and revolve around it
- 5. Bang Theory, An explosion that created the universe
- 7. , Any star at the middle of a solar system
- 9. The earth's natural satellite
- 10. , a fixed luminous point in the night sky