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 ...

NASA’s Galileo spacecraft gave us our best look at Ganymede’s surface. It showed icy plains, craters, and a mix of grooves and ridges which means there was probably some past geological activity.

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 ...

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 ...

The GAnymede Laser Altimeter (GALA ... The moon is characterised by unique structures due in large part to tectonic shifts, impact craters and basins as well as possible cryovolcanism. GALA was ...

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 ...