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Across
  1. 2. this planet takes 365 days to revolve around sun
  2. 5. the largest moon in the Solar System
  3. 7. cosmic body of extremely intense gravity
  4. 8. this planet has the biggest volcano ever discovered in the solar system.
Down
  1. 1. Saptarishi is the Indian name of which Constellation?
  2. 3. Nebulae are mostly made of
  3. 4. the smallest planet in the Solar System
  4. 6. occurs when one heavenly body such as a moon or planet moves into the shadow of another heavenly body.