Hydrogen and helium
The gases that make up Uranus' atmosphere is mainly hydrogen, helium, and methane.
Saturn has an atmosphere, but it is not like Earth's. Saturn's atmosphere is composed primarily of hydrogen with some helium, small amounts of methane, ammonia, and trace other gasses. Earth's atmosphere is primarily nitrogen and oxygen with small amounts of water vapor, argon, carbon dioxide and trace gasses.
Atmosphere.
No. Planets do not produce light, only stars (such as the sun) can. The light from the stars (sun) reflect off the surface of the planet or the gasses in its atmosphere.
Any gas or group of gases can make a thin atmosphere.
The atmosphere is composed of approximatly 79% Nitrogen - 20% Oxygen - 1% Argon and 'other gasses'
Hydrogen and helium mostly, some ammonia and methane too though.
The colors on Saturn come from a combination of its atmosphere, icy rings, and various elements in its composition. The bands of different colors in Saturn's atmosphere are caused by different compositions and altitudes of clouds, while the rings reflect a range of colors due to varying ice composition and particle size.
Nitrogen and oxygen.
CO2 makes up approximately 0.03% of Earth's atmosphere
The gases that make up Neptune's atmosphere are 80% hydrogen, 19% helium and 1% methane gas.
78% Nitrogen,and 21% Oxygen