Aurorae discovered on all four major moons of Jupiter

Aurorae discovered on all four major moons of Jupiter

A team of astronomers using the W. M. Keck Observatory in Hawaii has discovered that aurorae at visible lengths appear on all four of Jupiter’s major moons, namely Io, Europa, Ganymede, and Callisto. The discovery was made using the High-Resolution Echelle Spectrometer (HIRES) at the Keck Observatory, as well as other high-resolution spectrographs at the Large Binocular Telescope and Apache Point Observatory.

Jupiter at opposition to the Sun

Jupiter at opposition to the Sun

Jupiter will take center stage in the sky this month as it nears opposition to the sun. At opposition, expected on Oct. 29, Jupiter shines opposite the sun in our sky.  Jupiter will rise in the eastern sky at sunset, stay out all night long and set in the west at