Scientists Detect Mysterious Giant Wave Moving Through the Milky Way

TL;DR
Scientists using Gaia data have discovered a massive wave rippling through the Milky Way's disc, stretching over thousands of lightyears, but the cause remains unknown, with possibilities including past galactic collisions.
- There's a huge wave rippling through our Galaxy, and scientists have no idea what's causing it BBC Sky at Night Magazine
- Scientists Discover a Giant, Unexplained Wave Rippling Through the Milky Way SciTechDaily
- A “Great Wave” Is Crashing through the Milky Way Sky & Telescope
- A Massive ‘Great Wave’ in Our Galaxy Is Literally Pushing Stars Around VICE
- Data From Dead Space Telescope Shows Huge Wave Washing Over Stars in the Milky Way Galaxy autoevolution
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Read on BBC Sky at Night Magazine