A distant galaxy doesn’t seem to contain any dark matter, and that’s really weird

Billions of years ago, our Milky Way galaxy pulled itself together. 

Our home condensed from gas that gathered in our small part of the universe, swirled together thanks to gravity provided by dark matter — the mysterious substance that makes up 85 percent of matter in the universe and doesn’t interact with regular matter. 

That dark matter allowed the Milky Way’s gas — i.e. the “normal” matter — of our galaxy to condense and form stars. 

Researchers have thought for some time that, for the most part, galaxies need to form with the help of dark matter because of the extra gravity the mysterious, plentiful substances provides. Read more…

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