The Milky Way is Still Rippling from a Galactic Collision Millions of Years Ago
- Mon 24 Sep 2018 10:26:PM
Between 300 million and 900 million years ago, our Milky Way galaxy nearly collided with the Sagittarius dwarf galaxy. Data from the ESA’s Gaia mission shows the ongoing effect of this event, with stars moving like ripples on the surface of a pond. The galactic collision is part of an ongoing cannibalization of the dwarf …
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