There are two types of planets in our solar system: gas giants planets and terrestrial planets. Gas giants (such as Jupiter, Saturn, Uranus, and Neptune) are not made of solid material. Instead they are mass conglomerates of gaseous structures and their atmospheres are composed mostly of hydrogen and helium. Terrestrial planets (Earth, Mars, Mercury, and Venus) are rich in carbon dioxide, oxygen, nitrogen, and ozone. Mars’ atmosphere is likely the most common to our since it had an abundance of carbon dioxide, nitrogen, argon and even has a little bit of water vapor.
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