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Across
  1. 5. these constellations have a big and a little version (answer is the second word in both constellations)
  2. 6. the name of the most famous space telescope
  3. 8. the planet closest to the sun
  4. 9. the name of the closest complete galaxy to our own
Down
  1. 1. what a shooting star actually is
  2. 2. girls go to college to get more knowledge, boys go to [blank] to get more stupider
  3. 3. the name of our galaxy (one word)
  4. 4. a constellation named after a hunter in Greek myths who was a friend of Artemis; his constellation is known for its belt
  5. 7. used to be the ninth planet in our solar system