SOLAR SYSTEM

Detailed explanation-1: -While terrestrial planets accreted from planetesimals made of rocks and metals, they ended up too small to capture significant amounts of the abundant hydrogen and helium gas in the solar nebula. The jovian planets, however, formed farther from the Sun where ices and rocks were plentiful.

Detailed explanation-2: -However, while our Sun was still a cloud of gas, the outer planets with large solid cores and, therefore, strong gravitational pull attracted hydrogen and helium from the nebula before the sun actually formed. Thereby, the large amounts of gas they attracted now counts for most of the surface of their planets.

Detailed explanation-3: -The gas/ice giants are farther away because when the Sun “switched on” those components were far enough away not to be blown away by the Solar Wind (stream of charged particles from the Sun). Why do gas giant planets not form closer to their star?

Detailed explanation-4: -Answer and Explanation: Gas planets are bigger than terrestrial planets because they are older and more massive. They have more gravity which causes them to condense their particles into a denser object.

Detailed explanation-5: -Since the inner planets didn’t have enough mass to hold on to these light gases, their hydrogen and helium floated away into space. The Sun and the massive outer planets had enough gravity to keep hydrogen and helium from drifting away. All of the outer planets have numerous moons.