Ghost galaxy that hit the Milky Way spotted by astronomers

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Astrophysicists Sukanya Chakrabarti and Leo Blitz of the University of California, Berkeley, may now have proof that The Milky Way survived a galactic hit and run millions of years ago.

Ten years ago, astrophysicists Sukanya Chakrabarti and Leo Blitz of the University of California, Berkeley, suggested that ripples in the outer gas disk of the Milky Way were caused by a collision with a dwarf galaxy that shook the Milky Way’s gas like a pebble dropped in a pond. The pair made predictions for how massive and distant the galaxy had to be, as well as roughly where it should be found. As many as nine dwarf galaxies were found outside of the Milky Way that fit the criteria. 

Now, Chakrabarti thinks she’s found her quarry, she reported June 12 in St. Louis at the American Astronomical Society and in a study posted on arXiv.org. 

Credit: Science News, USA


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