Universe

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Across
  1. 4. the first dog to fly into space and never return?
  2. 7. He was the first to argue that the Earth is not the only planet and they all revolve around the sun.
  3. 8. What color are cool stars
  4. 9. What is the name of the stone if it came to the planet from outer space?
  5. 10. What is the name of "shooting stars"?
Down
  1. 1. who was the first to study space using a telescope?
  2. 2. what is the translation of the word "cosmos" from Greek?
  3. 3. Cosmonaut call sign "Kedr".
  4. 5. What is the name of the celestial body that revolves around the sun and has a tail?
  5. 6. what is the name of the science that studies the universe.