The Milky Way has a Colossal Wave Rippling Through It, Astronomers Say
SMRTR summary
The European Space Agency's Gaia space telescope has revealed a massive wave of motion rippling through nearly half of the Milky Way galaxy, causing over 20,000 young stars to move in synchronized patterns that span 30 to 65 thousand light years from the galaxy's center. Scientists believe this wave formation may have resulted from a dwarf galaxy either passing by or being consumed by the Milky Way in the distant past.
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