supermassive black holes
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Black Holes And Galactic Cluster Combine Into A Giant Cosmic Particle Accelerator
Two billion light years away, two clusters of galaxies are colliding in an intergalactic pileup. As black holes interact with the gas inside the collision, the mass has turned into an enormous particle launcher, spewing some of the universe’s highest-energy stuff.
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Something Very Strange Is Happening With This Supermassive Black Hole
Astronomers have just discovered one of the biggest black holes ever. Even more surprising, though, is where they found it — and the strange reason it got so big.