#cosmology

A new study shows transfer learning can speed up cosmological simulations but warns that AI systems can become too reliant on existing knowledge, potentially missing new physics.

Researchers using the James Webb Space Telescope have produced their most detailed map yet of the cosmic web, tracing galaxy filaments back to about 1 billion years after the Big Bang.

Astronomers using the James Webb Space Telescope and gravitational lensing have identified LAP1-B as the most metal-poor early-universe galaxy yet observed, offering a rare look at conditions about 800 million years from

New research proposes an explanation for the unexpectedly massive black holes that the James Webb Space Telescope has found in the universe’s first billion years.

A new review of the Hartle-Hawking no-boundary proposal argues that the idea remains conceptually attractive but still faces major obstacles, from the lack of a working theory of quantum gravity to predictions that do

The TIME instrument at Kitt Peak is using line-intensity mapping to study light from many faint galaxies at once, opening a new way to examine the Epoch of Reionization.

Astronomers using James Webb data have reconstructed the cosmic web at a new level of detail, offering a clearer picture of how galaxies formed and evolved across deep time.

A new Universe Today analysis revisits the Wheeler-DeWitt equation and Stephen Hawking's later arguments to explore whether the question of the universe's beginning may break down at the deepest level.

A study led by UC Riverside physicist Hai-Bo Yu proposes that dense clumps of self-interacting dark matter could explain anomalies seen in gravitational lenses, stellar streams, and satellite galaxies.

After five years of observations, DESI has built its most detailed 3D map of the universe and added weight to the possibility that dark energy may not be constant over time.

Researchers say a new AI approach called GAME could improve how astronomers reconstruct the universe’s evolution, potentially giving scientists a stronger way to test the standard model of cosmology.

Using data from the Dark Energy Spectroscopic Instrument, researchers have built the largest 3D map of the universe yet, giving scientists a more detailed way to trace cosmic structure and probe dark energy.

A set of preprints described by New Scientist suggests the universe may be less homogeneous on the largest scales than standard cosmology assumes, potentially opening a path toward resolving some long-running puzzles.

The idea that the universe could eventually collapse and be reborn in another big bang had fallen out of favor, but new discussion around DESI data has given the big bounce fresh visibility.

A large study highlighted by Gizmodo found that observations of the universe’s biggest structures remain consistent with Newtonian and Einsteinian gravity, weakening the case that modified gravity alone explains cosmolog

Using HETDEX data, astronomers report tens of thousands of giant hydrogen gas halos around galaxies from 10 to 12 billion years ago, offering new support for ideas about how early galaxies grew during cosmic dawn

A longstanding open problem in particle physics remains unresolved: whether neutrinos are distinct from their antiparticles or are instead Majorana particles that are effectively their own opposites

The Fred Young Submillimeter Telescope has been inaugurated on Cerro Chajnantor in Chile, combining an extreme high-altitude site with a wide-field design built for rapid surveys of the millimeter and submillimeter sky.

A new synthesis of decades of cosmological data strengthens the case that current theory still cannot fully explain why different methods produce different expansion rates for the universe.

The Dark Energy Spectroscopic Instrument has finished the largest 3D map of the universe yet, giving cosmologists a powerful new dataset for probing dark energy and testing whether the standard picture of cosmic expansio