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, ...

Once you get out to Ganymede, many people stop caring. Io and Europa have stolen the spotlight, leaving the last two Galilean moons as a fleeting thought, if even that. A cut-out of Ganymede. From the ...

Today, NASA announced evidence that Jupiter’s largest moon, Ganymede, contains a liquid water ocean floating beneath its crust. The discovery is a masterpiece of indirect detection, using Hubble Space ...

An ultraviolet light show has provided space scientists with the best evidence yet that the Jovian moon Ganymede has a gigantic ocean beneath its icy surface. Images captured by the Hubble Space ...

Most people who have an interest in space and astronomy know that Europa and Enceladus have subsurface oceans that could, according to exobiologists, contain alien life. Another notable moon is Io, ...

Astrobiologists ooh and ahh over the possibility that oceans hidden beneath the ice of the Jovian moon Europa and the Saturnian moon Enceladus may harbor life — but let's not overlook Ganymede, an ...

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, ...

Jupiter's moon Ganymede is the largest satellite in the solar system. Larger than Mercury and Pluto, and only slightly smaller than Mars, it would easily be classified as a planet if were orbiting the ...

Identifying liquid water on other worlds, big or small, is crucial in the search for habitable planets beyond Earth. Though the presence of an ocean on Ganymede has been long predicted based on ...