Space Crossword

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Across
  1. 1. hottest star
  2. 2. 7th planet from the sun
  3. 3. also known as the gas giant
  4. 5. Mons the tallest volcano on mars
  5. 7. Earths sister planet
Down
  1. 1. what astronauts travel in
  2. 4. a creature in space
  3. 6. also known as the the red planet