black holes with stellar mass

NASA’s Nancy Grace Roman Telescope will hunt for small black holes left over from the Big Bang

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Black Hole Week is in full swing and to celebrate, NASA has explained how its next big astronomical instrument, the Nancy Grace Roman Space Telescope, will hunt for small black holes dating back to the Big Bang. When we think of black holes, we tend to imagine enormous cosmic monsters, such as stellar-mass black holes … Read more

A vampire’s black hole is a ‘cosmic particle accelerator’ that could solve a long-standing astronomical mystery

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Scientists may have found evidence that black vampire holes that feed on their victim stars – so-called microquasars – are the cosmic particle accelerators responsible for mysterious high-energy cosmic rays we see bombarding Earth. These stellar-mass black holes exist in binary systems with a supergiant star from which they greedily strip material. Some of that … Read more