astro3

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Across
  1. 4. Period of darkness in a day
  2. 6. Satellite of Jupiter with intense volcanic activity
  3. 7. The blue planet
  4. 8. Measure of brightness for celestial objects
  5. 9. Constellation with three prominent stars in its belt
Down
  1. 1. Icy body with a tail
  2. 2. Hiding of one celestial body by another
  3. 3. Largest planet in our solar system
  4. 5. Outer layer of the Sun