This image shows the dark terrain of Ganymede.
Click on image for full size
Dark Terrain of Ganymede
This image shows an example of the dark terrain of Ganymede. This image shows frost on the ground. The next image shows more of the dark terrain.
The dark terrain is much older than the light terrain of Ganymede. Evidence for the age of the surface is found in it's many craters. Is this respect it very much resembles the surface of Callisto.
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This image shows an example of the light terrain of Ganymede. ...more
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
The surface of Callisto is deeply marked with craters. Craters are the little white marks in the picture. It looks like it might be the most heavily cratered body in the whole solar system. And some of...more
The surface of Ganymede is halfway between Callisto and Europa. There are portions of the surface of Ganymede that have many craters, like Callisto and there are portions which are relatively new, and...more
Amalthea was discovered by E Barnard in 1872. Of the 17 moons it is the 3rd closest to Jupiter. Amalthea is about the size of a county or small state. Amalthea is named after the goat in Greek mythology...more
Callisto was first discovered by Galileo in 1610. It is the 2nd largest moon in the solar system, and is larger than the Earth's moon. It is about as big as the distance across the United States. Callisto...more
Measurements by the Galileo spacecraft have been shown that Callisto is the same inside from the center to the surface. This means that Callisto does not have a core at the center. This means that, unlike...more