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Do All Galaxies Have Dark Matter?
The discovery of two ghostly galaxies created a hullabaloo in the astronomical community. But the jury’s still out on what’s really going on.
By Jake Parks
Dec 3, 2020 12:00 AM
This blurry cloud is actually a galaxy, and yes, it’s weird that you can see through it to the galaxies beyond. Some astronomers think galaxy DF2 is see-through because it’s missing dark matter. Others aren’t convinced. (Credit: NASA, ESA and P. van Dokkum/Yale University)
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