Astronomy

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Across
  1. 3. A belt of comets and other larger bodies beyond Neptune.
  2. 9. A space rock that burns up in Earth's atmosphere.
  3. 10. An object that orbits planets or moons.
  4. 12. A prominent constellation named after a hunter in mythology.
  5. 13. A distant, highly energetic celestial object.
  6. 15. Second planet from the sun known for its harsh surface.
Down
  1. 1. An event where one celestial body obscures another.
  2. 2. A rotating neutron star that emits pulses of radiation.
  3. 4. A giant cloud of dust and gas in space.
  4. 5. A particle representing a quantum of light.
  5. 6. The point in the orbit of a planet at which it is furthest from the sun.
  6. 7. Celestial object with a nucleus of ice and dust.
  7. 8. A large system of stars held together by gravity.
  8. 11. The universe seen as a well-ordered whole.
  9. 14. The planet known for rotating on its side.