5+ hour, 43+ min ago   (878+ words) What happens to Webb’s mysterious little red dots as the universe ages? The Saguaro galaxy’s red nucleus offers a way to explore their hidden surroundings. When the James Webb Space Telescope began finding tiny, intensely red sources in the early…...

9+ hour, 58+ min ago   (129+ words) Slate On this day in 2015 gravitational waves were detected for the first time by the Advanced LIGO interferometers in Louisiana and Washington state. The waves, predicted by Einstein’s general relativity, are caused by the rippling of spacetime caused by movement…...

20+ hour, 30+ min ago   (236+ words) Scientists using NASA's Chandra X-ray Observatory have discovered a new class of objects that behave differently from anything they have seen before. The newly spotted objects give off unusually low-energy X-rays but intense ultraviolet radiation, and scientists believe they could…...

1+ day, 3+ hour ago   (603+ words) The enormous Cygnus Bubble is usually linked to a busy star-forming region. A new study argues that the microquasar Cygnus X-3 may be the more natural source of its highest-energy gamma rays. Cygnus X-3 is a microquasar, a binary system containing a…...

1+ day, 4+ hour ago   (663+ words) The cosmic microwave background is the oldest light we can observe. Here is where it came from, what its tiny patterns reveal, and why it still matters. About 380,000 years after the Big Bang, the expanding universe had cooled enough for…...

1+ day, 9+ hour 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…...

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3+ day, 10+ 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…...

5+ day, 16+ 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…...

2+ day, 18+ 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…...