Space

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Across
  1. 4. A gas that makes up the Sun
  2. 5. A group of stars in the night sky
  3. 9. A device sent to the stars to get information and take measurements
  4. 10. Everything that exists
Down
  1. 1. A moon of Mars
  2. 2. A place in space with extremely strong gravity
  3. 3. A piece of a comet or an asteroid fallen to the Earth
  4. 6. A unit used to measure distances in space
  5. 7. The farthest planet of the Solar system
  6. 8. An ice giant rotationg on its side