Wausau Pilot & Review Skywatchers have plenty to chase this week, from a fading comet in the evening and a brighter one ...

Looking for a sky event this week? Check out our full Sky This Week column. April 1: A Full Pink Moon and a double star You'll want eyes on Jupiter this evening as Europa passes north of Callisto ...

Add Yahoo as a preferred source to see more of our stories on Google. Like Earth, Jupiter experiences brilliant auroras around its poles — but something funky happens with Jupiter's Galilean moons ...

If there was a contest for the most interesting moon in our solar system, Callisto would be a contender. Jupiter's second-largest moon has more impact craters on its surface than any other planetary ...

New evidence from an old NASA mission supports the theory that Jupiter's moon Callisto is in fact an ocean world. Credit: NASA / JPL / DLR A moon of Jupiter about the size of Mercury likely has a ...

ESA's Mars Express orbiter captured footage of the Mars' moon Deimos pass in front of Ganymede, Europa, Jupiter, Io and ...

Sky This Week is brought to you in part by Celestron. Friday, April 3Mercury reaches greatest western elongation at 7 P.M.

The gas giant Jupiter still dominates the constellation Taurus as it sets in the west after sunset. Jupiter now stands just to the right of Alheka (Zeta Tauri), one of the tips of the Bull’s two horns ...

Differences in the number and speed of cometary impacts onto Jupiter’s large moons Ganymede and Callisto some 3.8 billion years ago can explain their vastly different surfaces and interior states, ...