If there was a contest for the most interesting moon in our solar system, Callisto would be a contender. Jupiter's ...

A stunning Blood Moon March 13/14 caps off plenty of planetary action and sparkling stars in the sky this week.

If true, that would make Callisto a close sibling to Europa, another moon of Jupiter ... also been detected in Callisto's extremely thin atmosphere.

March's full moon, known as the Worm Moon, will bring a stunning total lunar eclipse, turning the Moon a deep reddish hue in ...

The designed mission had to be aligned to current work being performed by NASA but separate from active missions such as the Europa ... the only moon in the solar system with a dense atmosphere ...

Pictures may enliven us, but other data, such as information about magnetic fields, add a huge amount to our understanding of ...

Multiple people familiar with the White House proposal said cuts to NASA's "Science Mission Directorate" could be as high as ...

The findings can help scientists better understand the inner workings of the moon. The forthcoming Europa Clipper mission, expected to be launched in the mid-2020s, will give scientists a close look ...

involving scanning Neptune's moon Triton to see if it has a subsurface ocean. This presented a challenge, because of Triton's intense ionosphere, which is the last layer of the atmosphere before ...

Most of this debris burns up in the earth’s atmosphere when they get too close ... NASA launched the Clipper mission to study Jupiter’s moon Europa, which is similarly dynamically linked ...