Astronomy crossword puzzle

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Across
  1. 5. a meteorite lacking condrules associated with larger bodies.
  2. 6. the distance from an astronomical body at which it's gravitational force can pull apart another astronomical body
  3. 8. smaller planets
  4. 10. orbits the sun
  5. 13. a small spherical grain embedded in a meteorite.
  6. 15. the velocity of a body along the line of sight.
  7. 16. a meteorite containing small spherical grains.
  8. 17. resembles earth
  9. 18. the out flow of low-density.
Down
  1. 1. the solid remains of a meteor that falls to earth.
  2. 2. regions in the asteroid belt with fewer than the average number of asteroids.
  3. 3. the bending of light from a distant object to form an image.
  4. 4. rocky or metallic bodies
  5. 7. gavitational attractions prevent particles.
  6. 9. the core of an atom around which the electrons orbit.
  7. 11. the conversion of ultraviolet light.
  8. 12. cliffs formed where the crust has shifted.
  9. 14. the gravittational holder for planets