Comets and Asteroids by Michael D. Cole

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Across
  1. 3. The force that attracts a body toward the center of any object with mass
  2. 5. Ring of comets beyond the orbit of Neptune
  3. 7. A spherical envelope surrounding our solar system that lies beyond the orbit of Pluto
  4. 10. The tail of dust particles that streams from a comet as it comes closer to the sun
Down
  1. 1. A rock in space
  2. 2. A trail of particles behind a comet that is swept away by solar wind
  3. 4. The frozen part of a comet that is made of ice and dust
  4. 6. wind A constant outward flow of particles from the Sun
  5. 8. An icy rock in space
  6. 9. Elliptic path of an object in space that is affected by gravity