A massive collision billions of years ago may have dramatically reoriented Ganymede, Jupiter’s largest moon. Naoyuki Hirata at Kobe University, Japan, and his colleagues studied Ganymede’s ...

Space crash: New research suggests huge asteroid shifted Jupiter's moon Ganymede on its axis An asteroid 20 times larger than the one that struck Earth and led to the extinction of the dinosaurs ...

At nearly 3,300 miles in diameter, Ganymede is also the solar system’s largest moon—bigger even than the 3,030-mile wide planet Mercury. But that doesn’t mean it’s impervious to a pounding.

A new study revealed that a massive asteroid may have hit Jupiter’s moon Ganymede about 4 billion years ago, shifting the moon on its axis.

Ganymede is one of the most complex of Jupiter’s nearly 100 moons—and indeed, one of the most intriguing worlds in the entire solar system. It is the only known moon with its own magnetic ...

Ganymede is a tidally locked moon, which means it always shows the same face to Jupiter—and, as a result of the impact, the crater is permanently shielded from Jupiter’s view.

Three of Jupiter’s moons – Europa, Ganymede and Callisto – are home ... Callisto appears somewhat inert compared to the others, but serves as a valuable time capsule of an ancient past ...

While you’re trained on Jupiter for its conjunction with Mars, watch a triple event as the shadows of Io and Europa, as well as Io itself, cross the planet’s disk. Not shown are Ganymede to ...

Like Europa, Jupiter’s jumbo moon Ganymede is thought to host an underground ocean. But its frozen shell is much thicker — possibly 100 miles thick — making it tougher to probe the ...

This montage shows views of Jupiter's four 'Galilean moons' as captured by the LORRI camera system on NASA's New Horizons spacecraft in 2007 as it picked up extra momentum for its target, the dwarf ...

A massive collision billions of years ago may have dramatically reoriented Ganymede, Jupiter's largest moon ... Hirata’s team compared this process with an event on Pluto, where a large impact ...

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