"In our solar system, the most massive moon is Ganymede, which is still extremely small compared to what we are inferring here." When you purchase through links on our site, we may earn an affiliate ...

Ganymede transits the face of Jupiter this morning, trailed by its large shadow. The event starts just before 4 A.M. EST, as Jupiter is slowly setting in the west for much of the U.S. (The planet is ...

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In 2026, there will be journeys to the moon and Mars, new visions of the cosmos and a solar eclipse that might be worth traveling for. In 2026, there will be journeys to the moon and Mars, new visions ...

The first full moon of 2026 will occur on Saturday, January 3. January's full moon is traditionally known as the Wolf Moon. The name comes from Native American and European traditions referencing ...

On Dec. 28, 2000, NASA’s Galileo spacecraft discovered auroras on Ganymede, Jupiter’s largest moon. Galileo launched in 1989 on a mission to study Jupiter and its moons. It also flew by Venus and ...

Add Yahoo as a preferred source to see more of our stories on Google. On Dec. 28, 2000, NASA’s Galileo spacecraft discovered auroras on Ganymede, Jupiter’s largest moon. Galileo launched in 1989 on a ...

CAPE CANAVERAL, Fla. (AP) — Saturn's giant moon Titan may not have a vast underground ocean after all. Titan instead may hold deep layers of ice and slush more akin to Earth's polar seas, with pockets ...

New research suggests that Theia, the object whose collision with Earth is theorized to have caused the formation of the moon, came from closer to the sun. Artist’s impression of the collision between ...