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Across
  1. 3. the study of life in outer space
  2. 4. where life might be possible
  3. 6. 'wobbly' stars
  4. 8. a vehicle used for travelling in space
  5. 9. celestial object
  6. 10. a device used to observe distant objects in space
Down
  1. 1. the source of all energy
  2. 2. the length of space between two points
  3. 5. graph of light intensity of a star
  4. 7. planet passes in front of a star