As Monday's eclipse moves with the sun from Greenland, over , across the US and into , two specialized jets will be hot on its trail. Four scientists aboard two of NASA's three WB-57 research jets will cruise at 460 miles-per-hour in the stratosphere collecting data about the sun's corona — the celestial body's upper atmosphere, unusually visible as a halo during the event. The high altitude WB-57s will chase the eclipse from an altitude of 50,000 feet above sea level, recording data on how the sun impacts our ionosphere, how the sun's own atmosphere works, and incredibly hunting for long-theorized 'vulcanoid' asteroids.
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