Dark matter hitting black holes could be the source of some fast radio bursts – mysterious blasts of radio waves that come from billions of light years away, first detected 10 years ago.
The stuff we see in space – stars, planets and gas – only makes up about 18 percent of the mass of the universe. The rest is dubbed dark matter, which can’t be seen except through its gravitational interactions with everything else.
Nobody knows exactly what dark matter is, but one hypothesis is that it is formed of still-theoretical particles called axions. These particles, if they exist, would be very light, long-lived, and only interact weakly with other matter around them.
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