The largest impact crater in the Solar System may well have been discovered on Ganymede, a moon of Jupiter. On a surface of no less than 7,800 kilometers of radius. It was allegedly caused by an asteroid 150 kilometers in radius hitting the planet at a speed of 20 kilometers per second.
Ganymede is the largest natural satellite in our . It is even bigger than . And when Voyager probes in the late 1970s, then – between 1995 and 2003 – flew over this of , they discovered furrows in him. Years later, (Japan) looked again at these data. After a precise analysis of the orientation and distribution of these furrows, they suggest that they could be the last traces of a giant crater.
What to explain the internal structure of Ganymede
These furrows would be placed, on the surface of never detected in the . Much larger than the similar structure already identified on , another satellite of Jupiter: the crater Valhalla and its 1,900 km radius., along a ring pattern with a radius of no less than 7,800 km. And the allow researchers to suggest that the underlying crater may have been formed by the impact of a with a radius of 150 km striking at 20 km / s. It would then be, neither more nor less, that the
This discovery could explain the origin of the structure of Ganymede in differentiated layers. Such a structure, in fact, requires an enormous contribution of . And researchers now hope that future exploration missions can provide them with more precise information on this subject.. Whose source could well be this