Spaceship Earth

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Across
  1. 2. / It has a place of everything
  2. 5. / gaseous envelope surrounding the Earth in a several kilometers-thick layer.
  3. 6. / the force of attraction between all masses in the universe
  4. 7. / moon track
  5. 8. / 9 large celestial bodies in the solar system
Down
  1. 1. / a vehicle that can travel in space
  2. 3. / member of spacecraft
  3. 4. / nasa's domain
  4. 9. / third planet from the sun