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This image shows the varied terrain of Ganymede.
Click on image for full size
NASA

Surface of Ganymede

The surface of Ganymede is halfway between that of Callisto and that of Europa. Portions of the crust are of ancient age, while other portions are relatively new.

The little white dots shown in this image are the many imact craters on Ganymede. Portions of Ganymede that are heavily cratered have not been resurfaced, indicating that they are of ancient age.

Besides the craters, the surface of Ganymede is characterized by grooved terrain, light terrain, dark terrain.

The many different kinds of terrain exhibited by Ganymede are an indication that it has experienced processes of alteration in the interior during it's evolution.

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Surface of Callisto

The surface of Callisto is deeply pockmarked with craters. It looks to be perhaps the most severely cratered body in the solar system. There are also very large craters to be found there. The severity...more

Surface of Europa

The picture to the left shows examples of the many amazing different surface features of Europa. Many exciting discoveries were made about Europa during the Galileo mission. The surface of Europa is unusual,...more

Ganymede Tectonism

There has been no icy volcanism on Ganymede, but it does seem that there has been a kind of tectonism, or surface motion. Examination of the surface of Ganymede reveals many kinds of faulting and fracture....more

The Grooved Terrain of Ganymede

This image shows an example of the grooved terrain of Ganymede. The image clearly shows that some things hit Ganymede and made craters after the grooves were made, because the grooves are underneath the...more

Light Terrain of Ganymede

This image shows an example of the light terrain of Ganymede. The image shows the contrast between the light terrain and the dark terrain of Ganymede. The light terrain is where the grooves of Ganymede...more

Interior of Ganymede

The diagram to the left shows a cutaway of the possible interior structure of Ganymede, based on recent measurements by the Galileo spacecraft. It shows a small core of metal, overlain with some rocky...more

Europa Ice Flows

This is an example of terrain of Europa which has been flooded by fresh water which subsequently re-froze on the surface. The edges of the flow are "lobate" meaning rounded like a puddle of water. This...more

Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part is sponsored in part through grants from federal agencies (NASA and NOAA), and partnerships with affiliated organizations, including the American Geophysical Union, the Howard Hughes Medical Institute, the Earth System Information Partnership, the American Meteorological Society, the National Center for Science Education, and TERC. The American Geophysical Union and the American Geosciences Institute are Windows to the Universe Founding Partners. NESTA welcomes new Institutional Affiliates in support of our ongoing programs, as well as collaborations on new projects. Contact NESTA for more information. NASA ESIP NCSE HHMI AGU AGI AMS NOAA