Earth is a rocky planet because the gas giants are in the outer planets and earth is in the inner planet.
The planet Saturn.
blue
No, but its moon, Titan, may have volcanoes.
According to NASA and other professional/ non-professional sources, Planet X does not exist. However, it were to have eluded human detection, it would most likely be comprised of a rocky, frozen gas surface. Pluto has frozen liquid nitrogen for part of its surface composition, so it's relatively likely Planet X would be similarly comprised of that too.
Uranus
Neptune
Uranus, the 7th planet from the sun, is bluish-green and gaseous. This is due to the methane gas in its atmosphere.
Neptune.
Neptune
Uranus
Uranus
Jupiter. It is a gas giant planet.
Uranus or Neptune i think.... :P
You are describing Saturn. There are other gas giants in our Solar system, but Saturn has the rings.
Jupiter, Saturn, Uranus and Neptune are each mostly a big ball of gas.
The planet Uranus does have gas. One of the most abundant is methane which makes the planet look blue.