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• The jovian planets, Jupiter, Saturn, Neptune and Uranus, are massive but have low density since much of their composition is hydrogen in various forms. Terrestial planets such as earth and mars have high density with their metal cores and rocky outt…

  in astronomy help? Comment by bajatom May 2021
• The jovian planets, Jupiter, Saturn, Neptune and Uranus, are massive but have low density since much of their composition is hydrogen in various forms. Terrestial planets such as earth and mars have high density with their metal cores and rocky outt…

  in astronomy help? Comment by bajatom May 2021