Dylan's space crossword

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Across
  1. 4. having or representing the earth as a center
  2. 6. a space entirely devoid of matter
  3. 8. the point in the orbit of a planet or comet at which it is nearest to the sun.
  4. 11. a artificial satellite whose orbit is synchronized with that of earth
  5. 12. any of various groups of stars to which definite names have been given
  6. 13. the point in the orbit of a planet or a comet at which it is farthest from the sun
  7. 14. a small rocky body that orbits a star
  8. 15. an alignment of three celestial objects
Down
  1. 1. a star that viewed from a given latitude on earth never sets
  2. 2. when the moon blocks the sun or the sun blocks the moon
  3. 3. a unit of distance used in astronomy equal to about 3.26 light-years.
  4. 5. a small body of matter from outer space that enters earths atmosphere
  5. 7. the totality of known or supposed objects and phenomena throughout space
  6. 9. the time when the sun crosses the plane of the earth's equator, making night and day of approximately equal length all over the earth
  7. 10. science dealing with the material universe outside earths atmosphere