Space & Astronomy

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Across
  1. 3. Our galaxy
  2. 4. A man-made device which we use to look at celestial bodies
  3. 7. A giant ball of gas which can be tens of thousands of degrees on it's surface
  4. 9. A lifeform which is not from earth
  5. 11. Used to be known as "the 9th planet"
  6. 12. The monsterous result of a big enough star dying.
Down
  1. 1. A huge ball of materials and matter which most of the time orbits a star
  2. 2. The biggest and hottest types of stars
  3. 3. A big rock which orbits our planet
  4. 5. When the moon goes in front of the sun, making it appear black
  5. 6. The big ball of gas we orbit
  6. 8. A group of stars which some people connect the dots to make art
  7. 10. An "Unknown Flying Object," commonly related to aliens