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The Milky Way's Warp

The Milky Way's Warp


Date: 02 March 2020
Satellite: Gaia
Copyright: Stefan Payne-Wardenaar; Inset: NASA/JPL-Caltech; Layout: ESA

The structure of our galaxy, the Milky Way, with its warped galactic disc, where the majority of its hundreds of billions of stars reside. Data from ESA's star-observer Gaia recently proved that the disc's warp is precessing, essentially moving around similarly to a wobbling spinning top. The speed of the warp's rotation is so high that it must have been caused by a rather powerful event, astronomers believe, perhaps an ongoing collision with another, smaller, galaxy which sends ripples through the disc like a rock thrown into water.

Last Update: 2 March 2020
1-Jun-2020 14:05 UT

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https://sci.esa.int/s/WyV6Xe8

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