space words

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Across
  1. 4. an instrument used for measuring very small quantities of heat
  2. 6. the position of the moon in its orbit when at new or full phase
  3. 7. shaped like or forming a ring
  4. 10. a brilliant meteor which may explode during its descent through the earth's atmosphere
Down
  1. 1. the path the sun, moon and planets all follow in the sky
  2. 2. the center of gravity of the earth and moon
  3. 3. a group of atoms linked together
  4. 5. the bright surface of the sun
  5. 8. the dark inner part of a sunspot or shadow
  6. 9. the hazy looking patch surrounding the nucleus of a comet