On 31 March 2017, Jupiter's moon Europa passed in front of a background star--a rare event that was captured for the first time by ground-based telescopes thanks to data provided by ESA's Gaia spacecraft.
On 31 March 2017, Jupiter's moon Europa passed in front of a background star--a rare event that was captured for the first time by ground-based telescopes thanks to data provided by ESA's Gaia spacecraft.
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