SPACE AND UNIVERSE

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Across
  1. 3. The act of rising above the ground.
  2. 7. It is breathable on Earth.
  3. 8. It is in orbit around Earth.
  4. 9. Such objects can neither emit nor scatter light and are therefore black.
  5. 10. There are a lot of them in space.
Down
  1. 1. technical instrument used to see distance objects as stars.
  2. 2. It is constituted of many solar systems.
  3. 4. For example, the great bear is one.
  4. 5. There is nothing.
  5. 6. It is to measure distances in the solar systeme.