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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
Astronomers Detect 84 Mysterious Objects in Nearby Galaxies Unlike Anything They've Seen Before
1+ hour, 59+ min ago (400+ words) When we look at the night sky, darkness seems to fill the spaces between the stars....
What happened before the big bang? Scientists still aren’t sure
4+ hour, 59+ min ago (1848+ words) Unexplainable and Scientific American examine the mysteries science can’t yet explain Rachel Feltman joins Vox’s Unexplainable to discuss the enduring mysteries that continue to challenge science By Rachel Feltman, Sarah Scoles, Fonda Mwangi & Alex Sugiura Noam Hassenfeld: Rachel Feltman Hassenfeld:…...
A two-hour mesh observation found the boundary of what it could prove
5+ hour, 9+ min ago (225+ words) At 12:00Z on 15 September, a bounded two-hour observation recorded 463 source rows and 463 unique events. Its useful result was not a fleet-wide health verdict. It was the boundary between incidents the record measured and explanations it could not support. The window captured…...
Why Nothing in the Universe Can Reach -459°F or Absolute Zero — Not Even Empty Space
7+ hour, 11+ min ago (428+ words) No object in the universe, natural or man-made, has ever reached absolute zero — the temperature at which all thermal motion would stop. Physicists have gotten within a trillionth of a degree of it, but the laws of physics guarantee they'll…...
A scientist looked at 'little red dots' in the early Universe and found a black hole that shouldn't exist
7+ hour, 44+ min ago (731+ words) The mystery of ‘little red dots’ just got deeper, as a galaxy hiding an overmassive black hole hints at a whole population of cosmic Jekyll and Hydes There's something strange going on in the early Universe. The James Webb Space…...
The Universe Has More Secrets Than We Can Imagine
4+ hour, 26+ min ago (36+ words) A journey through the mysteries of space and the questions that still have no answers. Sometimes I look at the night sky and wonder how much is …...
Active Black Holes May Help Create New Stars in Nearby Galaxies
11+ hour, 1+ min ago (206+ words) ...
James Webb reveals Chariklo’s mysterious rings are changing faster than expected
11+ hour, 7+ min ago (379+ words) The James Webb Space Telescope has revealed surprising changes in the rings around Chariklo, a small object orbiting between Saturn and Uranus. Over just a few years, its inner ring became more opaque while its outer ring became less opaque....
Scientists in Switzerland aim to test a principle of Einstein's theory of gravity
19+ hour, 46+ min ago (248+ words) Researchers in Switzerland have taken an important step towards an experiment that could test one of the fundamental principles of Albert Einstein's theory of gravity. Scientists from ETH Zurich and the Paul Scherrer Institute (PSI) are preparing to study how…...
Maunakea Telescopes Confirm Most Distant Quasars Ever Found
17+ hour, 23+ min ago (195+ words) Hawaiʻi's observatories played a decisive role in confirming two quasars from the universe's earliest chapter, now the most distant ever confirmed. The pair dates back to the first 670 million years of cosmic history — roughly 5% of the universe's current age — and…...