Space

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Across
  1. 3. The study of stars and other objects in space
  2. 4. A bright circle seen around the Sun or the moon
  3. 6. The natural satellite of the Earth
  4. 8. The 4th planet from the Sun
  5. 9. Traveling through an unfamiliar area in order to learn about it
  6. 10. The star that the Earth orbits around
Down
  1. 1. To send or shoot a rocket into space
  2. 2. The line where the land or sea seem to meet the sky
  3. 3. A person who travels in space
  4. 5. The imaginary line that goes through Earth's core from the North Pole to the South Pole and around which Earth rotates
  5. 6. The planet closest to the Sun
  6. 7. The second planet from the Sun