space

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Across
  1. 3. sister planet of Earth
  2. 6. a group of stars and planets
  3. 7. is a region of spacetime where gravity is so strong that nothing, including light and other electromagnetic waves, is capable of possessing enough energy to escape it
Down
  1. 1. name Earths home galaxy
  2. 2. closes star
  3. 4. you live on it
  4. 5. everyware