Lunar minerals generate the rust mineral hematite when bombarded with high-energy oxygen particles, simulations show.

The Moon passes 5° north of Jupiter at 7 A.M. EDT. Early risers can enjoy the pairing before sunrise, standing some 50° high ...

The crescent moon will shine with Jupiter among the stars of Gemini early on Sept. 16. Turn your eyes to the east in the ...

When Edward Emerson Barnard peered through the 36-inch refractor at Lick Observatory on Sept. 9, 1892, and spotted Amalthea, it marked the first discovery of a moon of Jupiter in 280 years. Galileo ...

In a landmark observation by a team of international researchers, NASA's Juno spacecraft has, for the first time, clearly ...

In a landmark observation by a team of international researchers, NASA's Juno spacecraft has, for the first time, clearly detected the auroras of Jupiter's moon Callisto. This discovery completes the ...

The autumn night sky in Ireland is an observer's treasure-trove and the first celestial event of the season arrives on September 7 with a lunar eclipse and blood moon ...

Io, Europa and Ganymede had already shown their footprints through earlier observations. But Callisto, the farthest Galilean ...

However, prior to NASA's Juno mission, scientists had been unable to capture the auroral imprint of Callisto. The auroral phenomena of Jupiter are among the most striking natural wonders in the solar ...

Plus, catch Saturn and Neptune at their brightest; spy the "string of pearls" galaxy; and a close encounter of the moon and Jupiter. A night sky photographer enjoys the view of Moon, Venus, and ...