'One of the 3 main gases that make up Uranus' upper atmosphere'
hydrogen (or helium or methane)
URANUS: One of the 3 main gases that make up Uranus' upper atmosphere
One of the 3 main gases that make up Uranus' upper atmosphere
One of the 3 main gases that make up Uranus' upper atmosphere
URANUS
hydrogen or helium or methane
URANUS