Hubble Observes Rare Jupiter Conjunction

Europa, Callisto, and Io, three of Jupiters four largest moons, can commonly be seen transiting the face of the giant planet and casting shadows onto its cloud tops. However, seeing three.

This simulation illustrates the orbits and positions of Jupiters four largest moons on uary 24, 2015, during a rare triple-moon conjunction where the Hubble observations captured three.

The data showed a rare wave and a shrinking Great Red Spot.

FEBRUARY 5, 2015: Firing off a string of snapshots like a sports photographer at a NASCAR race, NASAs Hubble Space Telescope captured a rare look at three of Jupiters largest moons zipping.