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Nearly 20 years ago, astronomers observed a massive cloud of fine dust particles around a young star located just 63 light-years away from Earth. In recent observations from the Webb Space Telescope, however, the dust cloud had mysteriously vanished.
In about five years’ time, a potentially hazardous asteroid will swing by Earth at an eerily close distance of less than 20,000 miles (32,000 kilometers). During this rare encounter, Apophis will be ten times closer to Earth than the Moon and scientists want to take full advantage of its visit.