The Milky Way is 'rippling' like a pond, and scientists may finally know why
New research suggests that a strange 'ripple' is causing the Milky Way's stars to vibrate out of step, and an ancient collision with Sagittarius may be to blame.
TroibNews 
New research suggests that a strange 'ripple' is causing the Milky Way's stars to vibrate out of step, and an ancient collision with Sagittarius may be to blame.
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