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Ultrahigh-energy cosmic rays twist and turn on their way to Earth, which has made it nearly impossible to identify the colossal monsters that create them.
A supernova-like explosion dubbed the Camel appears to be the result of a newborn black hole eating a star from the inside out.
One black hole is nice, but astrophysicists can do a lot more science with 50 of them.
A new study shows that extreme black holes could break the famous “no-hair” theorem, and in a way that we could detect.
Small black holes were nowhere to be found, leading astronomers to wonder if they didn’t exist at all. Now a series of findings, including a “unicorn” black hole, has raised hopes of solving the decade-long mystery.
For decades, astronomers debated whether a particular smudge was close-by and small, or distant and huge. A new X-ray map supports the massive option.
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