Jupiter’s Galilean moons often transit the planet’s disk one at a time — tonight, however, Io and Europa cross the disk together. The two moons even appear to partially overlap as their transits begin ...

On October 10, 2025, a double transit event of Jupiter's moons, Io and Europa, along with their shadows, is observable across the planet's disk. This predawn phenomenon begins at 4:30 A.M. EDT with ...

The moons appear as two blurry dots located close together in the upper right area of the image. Io, seen as a darker speck on the left of the two dots, is the most volcanically active world in the ...

NASA's Juno spacecraft flew close to Jupiter on Jan. 12, capturing a stunning new view of the planet and two of its moons, lo and Europa. When you purchase through links on our site, we may earn an ...