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Milky Way: Stars travelling at excessive velocity might come from different galaxies


Extreme-velocity stars, which journey by the Milky Way with speeds of tons of of kilometres per second, might come from dwarf galaxies that our personal galaxy wolfed up



Space



8 April 2022

Illustration of the Milky Way galaxy as it might appear edge on. The Milky Way is a barred spiral galaxy roughly 100000 light-years in diameter. It is flat, shaped like two fried eggs back-to-back. At the centre is the nucleus, a vast flattened ball of old, red stars orbiting a supermassive black hole. This view imagines our galaxy seen from far from its nucleus, within the galactic plane. A lane of dust bisects the galaxy. Globular clusters (spherical clusters of stars) orbit here. One is seen in close up on the lower right.

Illustration of the Milky Way

Mark Garlick/Science Photo Library/Getty Images

The speediest stars within the galaxy, shifting at tons of and even 1000’s of kilometres per second, are additionally a number of the least well-studied. A examine of 15 of those fast-moving objects has discovered that almost all of them in all probability got here from dwarf galaxies devoured by the Milky Way within the distant previous.

“Some stars which are travelling quick have been [proposed to have] an extragalactic origin, however that is the primary time {that a} comparatively giant pattern has been analysed and proof has been proven that they …

Article amended on 8 April 2022

We corrected the speeds of the celebrities.



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