Mercury has little atmosphere, but what it does have is made up mostly of oxygen, sodium, hydrogen, helium and potassium. The thin atmosphere, or exosphere, does little to prevent or slow down impacts ...

Mercury has such a thin atmosphere that it doesn’t really qualify as an atmosphere. Instead, scientists call this wispy layer of gas an exosphere, where the gas is so rarefied that it hardly ...

our planet's loyal natural satellite companion does have a thin and wispy atmosphere. Scientists have long puzzled over the existence of this tenuous atmosphere or "exosphere" and have searched ...

Observations from the combination of the two missions will be over a sufficiently long period to allow the detection of changes in Mercury's magnetosphere and exosphere. A lack of changes in the ...