https://www.forbes.com/sites/jamiecartereurope/2022/10/25/why-is-the-milky-way-wobbling-how-cosmic-ripples-reveal-an-ancient-galactic-collision-ripping-apart-an-iconic-constellation/
Using data from the Gaia space telescope researchers in Sweden haves shown that large parts of the Milky Way's outer disk vibrate.
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