Author: Nadia Drake, National Geographic
-
This galaxy has almost no dark matter—and scientists are baffled
An unusual galaxy far, far away is stumping astronomers not because of what’s there, but because of what’s missing. What is this thing? About 65 million light-years away, the galaxy called NGC1052-DF2 is dim and diffuse, coming in at about one two-hundredths the mass of our Milky Way. Normally, not all of a galaxy’s mass…