Europa: A little moon with a chance of life At last count, Jupiter has 95 moons, but the four main ones — Ganymede, Callisto, Io and Europa — were discovered in 1610 by famed Italian ...

Japan's primary rocket builder, Mitsubishi Heavy Industries, is another titan of Japanese industry, but it has never launched ...

Callisto is also thought to have liquid water, too. The small, rocky body is constantly being stretched and compressed by Jupiter’s huge gravitational force, keeping the moon ‘malleable ...

A moon of Jupiter about the size of Mercury likely has a several-miles-deep ocean under its icy shell, according to a new study. This Jovian moon, Callisto, is the outermost of 95 circling the gas ...

Callisto may not make headlines like Io or Europa, but its beauty is unmatched. See this mysterious moon as you’ve never seen it before with these stunning high-resolution images. Dive into the ...

The Moon passes 2° south of Venus at 6 P.M. EST. You can catch the pair hanging together in the evening sky some 16° high an hour after sunset, brightening eastern Sagittarius.

Unlike our neighbouring planets, some of the moons have plenty of liquid water. Jupiter's moon, Europa, for example, is thought to contain more liquid water than all of Earth's oceans combined.

And Callisto, the most remote of the four, has a heavily cratered surface that has been unaltered for billions of years. But it is Europa that has garnered the most attention.

Callisto, one of Jupiter's moons, may have ozone, researchers say after successfully simulating its icy surface conditions in a lab 1. Ozone absorbs the Sun’s harmful ultraviolet radiation ...

Moonset: 8:12 A.M. Moon Phase: Waning gibbous (90%) Astrophotographers can capture the green color and long, thin tail of Comet Pons-Brooks. Credit: Manolo Gómez (Flickr) Friday, March 29 ...