A small icy world found far beyond Pluto has made the case for some proposed versions of Planet Nine look weaker, not stronger.
In July 1054, court astronomers in China recorded a new "guest star" near Tianguan, the star we now call Zeta Tauri.
For the first time, astronomers have found compelling evidence of a magnetar being born inside a supernova.
A galaxy merger found by the James Webb Space Telescope has made the early universe look less orderly than the standard picture suggests.
Saturn's sixth-largest moon leaks. Through a set of fractures near its south pole, nicknamed the tiger stripes, Enceladus vents a steady plume of water vapour and ice grains into space, feeding one of Saturn's faint outer rings.
Early Friday, over the South China Sea, the first stage of a Long March 10B rocket fell back through the sky, deployed four hooks, and let itself be caught by a net strung across the deck of a waiting ship.
A coronal mass ejection carries roughly a billion tons of magnetised plasma from the Sun to Earth in as little as 14 to 18 hours — and the same physics that lights the aurora can collapse a continental power grid in under two minutes.
{"content":"On 5 May 1986, two Soviet cosmonauts closed the hatch on a brand-new space station, fired their Soyuz thrusters, and drifted away from Mir on a trajectory no crew had ever attempted. Th
In July 2026, Isar Aerospace signed an agreement for a launch complex in Nova Scotia whose disclosed fixed-payment schedule totals US$112.5 million over 10…
Europe's Euclid telescope has found 31 of the oldest known quasars in one go, and the haul roughly doubles the number known from that early stretch of the universe.
The Federal Communications Commission has authorized radio operations for Eärendil-1, a demonstration satellite built around a reflector measuring roughly 18 metres by 18 metres.
The usual picture of life begins with a star. A planet forms around it, settles into an orbit where temperatures are not too hot or too cold, and receives the steady energy that makes chemistry possible.
SpaceX has applied to the U.S. Federal Communications Commission for permission to operate a 100,000-satellite “Gen3” system in low Earth orbit, with…
Webb has twice hinted at dimethyl sulfide, a life-linked gas, at the possible ocean world K2-18b. Independent teams re-examining the data doubt the molecule is there at all.
The James Webb Space Telescope has tracked how the atmosphere of a distant gas giant changes from longitude to longitude during transit, revealing pronounced differences between its morning and evening regions.
Water was thought to arrive on planets aboard comets and asteroids. A 2025 Nature study shows sub-Neptunes, the galaxy's most common planets, can make their own by reacting hydrogen atmospheres with molten rock.
