astronomy

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Across
  1. 2. so dense, even light cannot escape.
  2. 5. when the Sun plays peek a boo behind the moon.
  3. 7. solar system with two stars.
  4. 8. round rock that orbits a planet.
  5. 10. icy body with long visible vapor trail.
  6. 12. interstellar cloud of dust and gases.
Down
  1. 1. aura of plasma observable during eclipse.
  2. 3. body orbiting a sun, with its own gravity.
  3. 4. large floating rocks in space.
  4. 6. distance of annual photon travel.
  5. 9. gravitationally curved trajectory.
  6. 11. large bound system of stars.