Ratification of 128 additional moons puts the smaller gas giant way ahead on satellite count The International Astronomical ...

Io is the third-largest natural satellite of Jupiter. Its thin atmosphere consists mainly of sulfur dioxide, and its characteristic yellow, orange, and red colors result from being covered in sulfur.

Astronomers have discovered a panoply of new moons orbiting Saturn, bringing the ringed gas giant's total up to 274 moons—far ...

Jupiter has four large moons – Io, Europa, Ganymede and Callisto – with diameters of more than 3000 kilometres. However, as of April 2023, we know it is also home to 91 additional small satellites.

An international team of astronomers reports the detection of two new brown dwarfs orbiting distant stars using NASA's ...

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JUPITER'S satellite Io has remarkable control of Jovian decametric radio emission (recently reviewed 1,2) and also a very high and possibly varying albedo 3,4.

as in the case of the moons of Jupiter and Saturn, or relatively inverse, as in the case of the satellites of Uranus and Nep-tune. It will also lead to more exact data relative to the mass of Mars.