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Galactic Tug of War: Milky Way is Being Pulled and Deformed by a Smaller Neighbouring Galaxy, New Study Finds | The Weather Channel - Articles from The Weather Channel | weather.com - The Weather Channel
Nov 26, 2020 53 secs

Scientists now believe that this neighbouring galaxy intruded into the Milky Way’s boundary around 700 million years ago—fairly recent by cosmological standards—and its large dark matter content strongly upset our galaxy's fabric and motion as it fell in.

Previous research has indicated that both the Milky Way and the LMC are surrounded by such huge halos of dark matter, which can be described as elusive particles that surround galaxies and do not absorb or emit light but have dramatic gravitational effects on the movement of stars and gas in the universe.

They found that the LMC's dark matter halo has been pulling and twisting the Milky Way disc towards the constellation Pegasus (a constellation in our northern sky) at the speed of 32 km per second.

This is because the LMC, powered by its enormous gravitational force, is moving away from the Milky Way at an ever faster speed of 370 km per second.

Scientists describe the Milky Way’s movement as our galaxy trying to hit a fast-moving target, but not aiming very well.

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