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Astrophysics & Cosmology
Black holes, dark matter, gravitational waves, and the big‑picture universe.
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Latest in Astrophysics & Cosmology
JWST finds Chariklo’s inner ring growing denser while its outer ring fades
1+ hour, 35+ min ago (429+ words) Chariklo’s inner ring is getting denser. Its outer ring is fading. Both changes are happening at the same time — and, for the moment, nobody knows why. The finding matters beyond Chariklo itself. Ring systems around planets had already shown that…...
Early-Universe Plasma May Have Kept Dark Photons From Heating the Cosmos
1+ hour, 15+ min ago (282+ words) Dark photons are one proposed explanation for dark matter. A new calculation suggests that the early universe’s plasma may have stopped them from depositing heat as efficiently as earlier models predicted. The post Early-Universe Plasma May Have Kept Dark Photons…...
What Is the Cosmic Microwave Background? The Universe’s Afterglow
2+ hour, 45+ min 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…...
What if dark energy is evolving? Comprehensive new dataset questions a core assumption
8+ hour, 19+ min ago (411+ words) starlust.org What if dark energy is evolving? Comprehensive new dataset questions a core assumption For the first time, astronomers have assembled a catalog containing nearly 3,000 exploding stars. And now, all those stars are pointing them toward something they weren’t…...
Rare supernova lights up spiral galaxy 45 million light-years away; check out these pictures
25+ min ago (356+ words) starlust.org Rare supernova lights up spiral galaxy 45 million light-years away; check out these pictures A new supernova emerges This supernova named SN 2026aaiv in the galaxy Caldwell 30 or NGC 7331 was discovered by the ATLAS survey on September 1 and it's reportedly…...
When Einstein Failed, He Questioned: 5 Setbacks Before Changing the Science
2+ hour, 23+ min ago (31+ words) Before he changed science, Albert Einstein was simply a curious young man born on March 14, 1879, in Ulm, Württemberg …...
GAME: The New AI Method That Could Reveal How the Universe Changes Over Time
2+ hour, 27+ min ago (1234+ words) The universe is not static. Galaxies move apart, cosmic structures grow, and the influence of matter and dark energy …...
The Real Distance Between Everything Is Zero
2+ hour, 30+ min ago (409+ words) Einstein spent his life troubled by what he called “spooky action at a distance.” Two entangled particles can sit light-years apart. Measure one, and …...
Known physics suggests the early universe should have produced matter and antimatter in equal amounts. Nearly all of it annihilated into radiation, but roughly one extra matter particle survived for every billion pairs—and why that tiny imbalance existed remains one of physics’ deepest unsolved problems.
10+ hour, 1+ min ago (906+ words) The measured net baryon-to-photon ratio is about 6.1 parts in ten billion. Physics can describe the required ingredients for that excess, but no confirmed mechanism made it....
A New Catalog of Close to 3,000 Supernova Challenges Theories on Dark Energy
10+ hour, 37+ min ago (88+ words) The most comprehensive catalogue of exploding white dwarf stars ever assembled has revealed new clues about dark energy, the mysterious force driving the universe’s accelerating expansion....