Across
- 2. the type of galaxy we live in
- 4. the American astronomer who studies redshift in stars
- 6. how far light travels in a year
- 9. a collection of gas held together by gravity with nuclear reactions at its core
- 11. the most massive planet in our solar system
Down
- 1. a portion of the EM Spectrum that has a higher frequency than radio waves, but lower than infrared
- 3. the place where new stars are born
- 5. the hottest planet
- 7. the type of waves on the EM spectrum with the highest frequency
- 8. a collection of stars, dust, planets, etc held together by gravity
- 10. the closest star to Earth