Possible Planet Found in Whirlpool Galaxy (M51)

Using the change in brightness of an X-ray binary found in observations from two X-ray telescopes, scientists may have found an extragalactic planet.

Beth Johnson
2 min readNov 4, 2021

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CREDIT: X-ray: NASA/CXC/SAO/R. DiStefano, et al.; Optical: NASA/ESA/STScI/Grendler; Illustration: NASA/CXC/M.Weiss

Scientists using the ESA’s XMM-Newton and NASA’s Chandra X-ray telescopes may have found a planet in another galaxy. Not surprisingly…

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Beth Johnson

Planetary scientist, podcast host. Communication specialist for SETI Institute and Planetary Science Institute. Buy me a coffee: https://ko-fi.com/planetarypan