Astronomers Capture 2 Million MPH Galactic Collision with Sonic Boom
TL;DR Summary
Astronomers have observed a powerful shock wave in Stephan's Quintet, caused by the galaxy NGC 7318b colliding with its neighbors at 2 million mph. This cosmic event, akin to a sonic boom, has energized plasma and possibly triggered star formation. The study, using the WEAVE spectrograph, aims to provide insights into galaxy interactions and cosmic history, with findings published in the Monthly Notices of the Royal Astronomical Society.
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