Dwarf Planets, Minor Planets, and Comets

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Across
  1. 3. any celestial object that orbits the sun and is not classified as a planet, dwarf planet, moon, or comet
  2. 6. disk-shaped region beyond the orbit of Neptune that contains asteroids, comets, and other debris from the formation of the solar scale
  3. 7. a small grain about 1 millimeter in diameter embedded in a meteorite, often containing amino acids or other organic molecules
  4. 8. a fragment from an asteroid or comet traveling in an irregular orbit through the inner solar system
Down
  1. 1. an object composed of loosely bound rock and ice that appears to form a bright head and extended fuzzy tail when it approaches the sun
  2. 2. small, dry rocky body in orbit around the sun between Mars and Jupiter or beyond the orbit of Neptune
  3. 3. a meteor that does not completely vaporize and that strikes Earth's surface
  4. 4. an object in orbit around the sun that is massive enough to be round or nearly round but is not massive enough to have cleared its orbital area of space debris
  5. 5. a falling meteoroid that enters Earths atmosphere and glows as it vaporized; colloquially called shooting star