Any More Earths Out There?

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Across
  1. 1. the force that attracts a body towards any other physical body having mass
  2. 4. name of NASA's space telescope
  3. 5. a group of stars forming a recognizable pattern
  4. 8. planets that orbit stars beyond our sun like Jupiter and Saturn
  5. 9. what all life needs in liquid form
  6. 10. an expert of astronomy or the study of space
Down
  1. 2. optical instrument designed to make objects appear nearer
  2. 3. needed for life
  3. 6. number of Earth-like planets found by the Kepler team
  4. 7. to move across an area