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17 de abr. de 2024 · Just 1,924 light-years from the Solar System, in the constellation of Aquila, astronomers have just discovered a black hole. And it's not just any black hole. Named Gaia BH3, or BH3, the object is the most massive stellar-mass black hole we've ever spotted in the Milky Way, clocking in at a hefty 33 times the mass of the Sun. It's the second ...
Then It Started to Glow. Simulation of a warped and spinning black hole. (Yukterez/Wikimedia Commons, CC BY-SA 4.0) A black hole analog could tell us a thing or two about an elusive radiation theoretically emitted by the real thing. Using a chain of atoms in single-file to simulate the event horizon of a black hole, a team of physicists in 2022 ...
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The dorsal raphe area of the brain, imaged using confocal microscopy. ( Spitzer Lab, UC San Diego) They found that a severe fright sort of flipped a switch in the neurons, changing the neurotransmission mechanism from glutamate, which excites neurons, to GABA, which inhibits neuronal activity. The switch appears to sustain a fear response where ...
Humans 18 April 2024. By David Nield. Inside the Umm Jirsan cave. (Green Arabia Project) Archaeologists have uncovered a treasure trove of evidence that humans once occupied a cave in Saudi Arabia formed by flowing lava, shedding light on the fascinating history of human life in the region. The discoveries recorded by the international team of ...
Hawking radiation describes hypothetical particles formed by a black hole 's boundary. This radiation implies black holes have temperatures that are inversely proportional to their mass. Putting it another way, the smaller a black hole is, the hotter it should glow. Although it has never been directly observed, Hawking radiation is a prediction ...
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