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Helium makes up most of Neptunes atmosphere, and some within Uranus. It is this helium that gives Neptune it's blue hue.
Gas
Uranus (appropriately named!) and Neptune i believe!
Uranus and Neptune. (They may have traces of other gases.)
neptune is blue because of the methane gas in it's atmosphere
Neptune and Uranus both have high concentrations of methane in their atmospheres.
Both Uranus and Neptune have methane in their atmosphere which absorbs red light, allowing the blue hues to be reflected. Neptune is a lot more of a blue colour than Uranus, but Uranus has more methane in its atmosphere. Its though that other constituents in Neptune enrich its blue colour.
Helium makes up most of Neptunes atmosphere, and some within Uranus. It is this helium that gives Neptune it's blue hue.
hydrogen,helium, and methane
Because of the methane in their atmosphere.
Gas
No. There is no oxygen in Neptune's atmosphere
Uranus (appropriately named!) and Neptune i believe!
Neptune. It depends on what is being compared: core of planets OR atmosphere of planets.
Venus, Earth, Jupiter, Saturn, Uranus and Neptune.
These planets are Jupiter, Saturn, Uranus and Neptune.
It is a gassy planet like Jupiter, Uranus, and Neptune