Rpi jivelite2/12/2023 But now that we see their motion as a whole, we understand why the velocities are different, and why they are moving the way that they are." ![]() "This group of stars had a whole bunch of different velocities, which was very strange. "When we put it together, it was an 'aha' moment," said Heidi Jo Newberg, Rensselaer professor of physics, applied physics, and astronomy, and lead author of the The Astrophysical Journal paper detailing the discovery. Based on emerging data, astrophysicists at Rensselaer Polytechnic Institute proposed in 2019 that the overdensity was the result of a radial merger, the stellar version of a T-bone crash. Star surveys revealed that some of these stars are moving toward us while others are moving away, which is also unusual, as a cluster of stars would typically travel in concert. ![]() ![]() ![]() Astronomers identified an unusually high density of stars called the Virgo Overdensity about two decades ago.
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