A Milky Way-like galaxy (Messier 101): A close-up view of the Messier 101 galaxy, which is a spiral galaxy similar to the Milky Way galaxy. The Messier 101 has a pancake-like shape that we view face-on. This perspective shows off the spiral structure that gives it the nickname the “Pinwheel Galaxy.” Credit: NASA (http://hubblesite.org/image/2477/news_release/2009-07)
Study reveals that half of matter around us likely comes from far-flung galaxies. In a first-of-its-kind analysis, Northwestern University astrophysicists have discovered that, contrary to previously standard lore, up to half of the matter in our Milky Way galaxy may come from distant galaxies. As a result, each one of us may be made in part from extragalactic matter.
Using supercomputer simulations, the research team found a ...
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