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NASA's Chandra finds 84 mysterious "hypersoft" x-ray objects across 6 galaxies — But what are they?
4+ hour, 55+ min ago (346+ words) NASA’s Chandra X-ray Observatory has spotted 84 mysterious objects across six galaxies that are leaving astronomers with a major question. What are they? The objects give off unusually low-energy X-rays. Yet they also appear to produce powerful ultraviolet radiation. This strange…...
‘Odd couple’ black holes can find each other in space
2+ day, 5+ hour ago (477+ words) When two black holes find each other in the vastness of space, they can form a binary odd couple—and it’s more common than researchers expected. Scientists think most black holes are born when a star dies and its core…...
An Astrophysicist's Favorite Books on Cosmology
4+ day, 12+ hour ago (667+ words) To me cosmology was never really about the equations. It's the oldest thing we do, this itch to look up and try to explain the whole business, and it shows up in myth and in a whole constellation of confident-but-wrong…...
AI Video Reveals A New Picture Of Black Hole Jets And Challenges Shock Wave Theory
1+ day, 14+ hour ago (635+ words) A new AI-powered reconstruction method has transformed radio observations into a continuous video, revealing unexpected motion inside a distant black hole jet. For decades, astronomers have relied on Very Long Baseline Interferometry (VLBI) to study the enormous jets launched by…...
Scientists May Finally Hear The Birth Cries Of The Universe’s First Black Holes
1+ day, 12+ hour ago (775+ words) New gravitational wave observatories could detect ancient black hole mergers and reveal how the first stars shaped the early universe. New generations of gravitational wave detectors could soon detect the hidden remnants of the universe’s first stars, according to a…...
Unexplained Gamma-Rays from the Galactic Center Could be from Self-Annihilating Dark Matter
2+ day, 13+ hour ago (417+ words) In 2009, astronomers using the Fermi Gamma-ray Space Telescope discovered an excess of energy in the Milky Way's galactic center. Deep observations found no source for the energy, called the Galactic Center GeV Excess (GCE). What's generating it? Research in Physical…...
Scientists say the universe could tear itself apart. Here's how
2+ day, 14+ hour ago (445+ words) When we think about how everything would come to an end, we often imagine that the universe would slowly fade into dark nothingness over time. But there’s a theory, famously known as the Big Rip, that says it could end…...
NASA found a strange cosmic object that may explain how black holes become supermassive
2+ day, 19+ hour ago (900+ words) Little red dots should shine in X-rays if black holes power them. None did, until Chandra found one 11.8 billion light-years away that does. Astronomers have found a single object in the constellation Ursa Major that behaves like nothing else in…...
84 Hypersoft X-Ray Sources Found in Six Galaxies
2+ day, 18+ hour ago (1153+ words) The objects are unusually soft in X-rays but bright in extreme ultraviolet light—exactly the combination that makes them difficult to find and potentially important to the history of stars and galaxies. A galaxy can be full of powerful objects…...