In December 1995, Galileo dropped an atmospheric probe designed to measure the elements in Jupiter’s atmosphere—specifically, the abundance of carbon, nitrogen, sulfur, oxygen, and all the ...

Thanks to the Juno probe mission, a mystery about ... Io is the third-largest natural satellite of Jupiter. Its thin atmosphere consists mainly of sulfur dioxide, and its characteristic yellow ...

In the 1990s, however, NASA's Galileo spacecraft captured magnetic measurements near Callisto that suggested that its ice shell surface—much like that of Europa, another moon of Jupiter—may ...