Jamie Carter is an award-winning reporter who covers the night sky. Icy moon Ganymede—which JUICE will orbit—appears as a gray, mottled orb crossing the face of Jupiter ... [+] in this image ...

GALA is a 'laser altimeter' – an instrument that measures the heights and depths of a planetary landscape via the transit time of laser pulses. The GAnymede Laser Altimeter (GALA) for ESA's JUICE ...

Ganymede, Callisto and Europa. It's fair to say that of all the moons, it’s Io—the most volcanic world in the solar system—that inspired the most elaborate movement. “It’s constantly ...