NASA’s Juno spacecraft has provided the first close-ups of Jupiter’s largest moon in 2 decades.
Juno zoomed past icy Ganymede on Monday, passing within 645 miles . The last time a spacecraft came that close was in 2000 when NASA’s Galileo spacecraft swept past our solar system’s biggest moon.
NASA released Juno’s first two pictures Tuesday, highlighting Ganymede’s craters and long, narrow features possibly related to tectonic faults. One shows the moon’s far side, opposite the sun. “This is the closest any spacecraft has come to this mammoth moon in a generation,” said Juno’s lead scientist, Scott Bolton of the Southwest Research Institute in San Antonio. “We are going to take our time before we draw any scientific conclusions, but until then we can simply marvel at this celestial wonder — the only moon in our solar system bigger than the planet Mercury.”
Ganymede is one of 79 known moons around Jupiter, a gas giant. Italian astronomer Galileo Galilei discovered Ganymede in 1610, along with Jupiter’s three next-biggest moons.
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