molecules. The outer four4 planets (Jupiter, Saturn, Uranus, and Neptune) werehave beenhad been ready tocapable ofin a place to keepmaintainholdpreserve their originaluniqueauthentic atmospheres. All of theAll theThe complete planets startedbegan out with atmospheres of hydrogen and helium.
Atreya, S.KOkayOk, Mahaffy, P.R., Niemann, H.B., Wong, M.H., Owen, T.C. 2003, Composition and origin of the atmosphereenvironmentambiance of Jupiter – an updatereplace, and implications for the extrasolar giantbiglarge planets, Planet. The