Impact craters are the dominant geographic features on many solid Solar System objects including the Moon, Mercury, Callisto, Ganymede and most small moons and asteroids. On other planets and ...

This impact created a transient crater between 870 miles and 1,000 miles in diameter on Ganymede’s surface. Transient craters are the cavities formed immediately after the initial impact ...

Discovered by Galileo Galilei in 1610, Io, Callisto, Europa and Ganymede are proving to be fascinating topics of study for modern day astronomers. We’ve already sent a mission to one of them ...

Relationships between the surface roughness and reflectivity of geologic units with significant topography provide researchers with information on the geologic and tectonic processes that shaped ...

Jupiter’s Moon Ganymede: This image presents Jupiter's moon Ganymede as seen by the NASA's Hubble Space Telescope in 1996. In 1998, Hubble's Space Telescope Imaging Spectrograph took the first ...