New Supercomputer Runs Suggest the Early Milky Way Was Thousands of Smaller Galaxies, Some of Them Starless
CHICAGO — The neighborhood that became the Milky Way may have started as thousands of smaller galaxies, some…
JWST finds early galaxies were already spreading the ingredients for planets and life
JWST spectra reveal carbon, oxygen and silicon in gas associated with three galaxies seen when the universe was…
Supercomputer simulations may finally explain Webb’s mysterious Little Red Dots
Simulations suggest many of JWST’s Little Red Dots could be rapidly growing black holes surrounded by extraordinarily dense…
JWST detected an icy world beyond Jupiter transforming into a comet
JWST detected carbon dioxide gas around the active Centaur 450P/LONEOS while finding no detectable water-vapor or carbon-monoxide emission,…
JWST finds mysterious red objects pairing up in the early universe
JWST images have revealed four candidate pairs of “little red dots,” compact early-universe objects increasingly associated with rapidly…
NASA’s Nancy Grace Roman Space Telescope set to explore the universe
This weekend, NASA plans to launch its next flagship mission into deep space. The Nancy Grace Roman Space…
Astronomers find an ultra-dense mega-Earth 23 times our planet’s mass but only 2.5 times its size
GJ 523b is 2.55 times Earth’s radius but about 23.5 times its mass, making it unusually dense for…
2-kiloparsec trail of stars could reveal how dark matter shapes galaxies
A thin ribbon of stars around the ultra-diffuse galaxy UGC 9050-Dw1 may be the first globular-cluster stellar stream…
Astronomers Discover the Existence of a Black Hole Star
When Soundgarden Wrote “Black Hole Sun,” they may have inadvertently been onto something. In a new paper in…
Astronomers discover new type of cosmic object, ‘black hole star’
Is it a star or a black hole? A recently discovered astronomical object appears to be a bizarre…
New Gaia data is challenging a 50-year-old assumption about how stars and galaxies form
Astronomers found that star clusters do not always form the same balance of small and large stars, challenging…
The James Webb Telescope Is Changing Astronomers’ Understanding of the Ancient Cosmos
To test these new ideas, researchers are exploring the infant universe through simulations. “There’s actually been really remarkable…