The Solar System-Grade 6

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Across
  1. 2. The closest planet to the sun, it orbits the sun once every 88 days.
  2. 4. Named for the Roman god of the sea.
  3. 8. Made mainly from ices and dust, these objects can form tails millions of kilometers long when they pass near the sun.
  4. 11. Chunks of rock, most of which are found between the orbits of Mars and Jupiter.
  5. 12. This planet possesses the Solar System's most impressive system of rings
Down
  1. 1. This planet's axis is so tilted that it orbits the sun on its side.
  2. 3. This object is at the center of the Solar System.
  3. 5. This object is no longer considered to be a planet.
  4. 6. This planet is more massive than all of the others combined.
  5. 7. Although not the closest to the sun, this planet is the hottest because of a thick atmosphere of carbon dioxide.
  6. 9. Its two satellites are named Phobos and Deimos (Fear and Panic).
  7. 10. You were born on this planet, hopefully.