Introduction to Space

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