SOLAR SYSTEM

Detailed explanation-1: -A gas giant is a large planet mostly composed of helium and/or hydrogen.

Detailed explanation-2: -The four gas giants in our solar system are Neptune, Uranus, Saturn, and Jupiter.

Detailed explanation-3: -These planets were more massive than the inner planets and were able to attract large amounts of hydrogen and helium, which is why they are composed mainly of hydrogen and helium, the most abundant elements in the solar system, and in the universe.

Detailed explanation-4: -The atmospheric composition of the giant planets is mostly hydrogen, ranging from 63% to 93% hydrogen by mass. Most of the rest is helium, with only tiny traces of other compounds.

Detailed explanation-5: -Atmospheres. The atmospheres of Jupiter and Saturn are made almost entirely of hydrogen and helium, although there is some evidence they contain hydrogen compounds. Uranus and Neptune are made primarily of hydrogen compounds, with smaller traces of hydrogen, helium, metal and rock.

Detailed explanation-6: -As with Jupiter, Saturn is mainly composed of hydrogen and helium and is observed to be of surprisingly low density. Saturn’s mean density is only about two-thirds that of water.

Detailed explanation-7: -Unlike the terrestrial planets that make up our inner solar system-Mercury, Venus, Earth, and Mars-the Jovian planets do not have solid surfaces. Instead, they are composed primarily of hydrogen and helium, with traces of methane, ammonia, water, and other gases in their atmospheres.