Planets made of dark matter may have blown up

Dark matter remains frustratingly elusive. We have not seen any direct detection in any of our laboratory experiments, and at cosmic scales we only have circumstantial evidence that it exists.

Now, the new hypothesis proposes that a large fraction of dark matter may be bound up inside tight balls the size of Neptune — so-called dark matter planets. But while those planets would remain invisible to us, they might collect atmospheres of helium and hydrogen that could undergo nuclear fusion, giving us a major clue to their presence.

dark matter planets

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