Animation For just the second time ever, astrophysicists have spotted a spectacular flash of ultraviolet (UV) light accompanying a white dwarf explosion. An extremely rare type of supernova, the event is poised to offer insights into several long-standing mysteries, including what causes white dwarfs to explode, how dark energy accelerates the cosmos […]

DESI was mounted on the 4-meter Mayall Telescope at Kitt Peak National Observatory. Kitt Peak National Observatory (KNPO) is located 56 miles southwest of Tucson, Arizona, in the Schuk Toak District on the Tohono O’odham Nation. KPNO is administered by the NSF’s National Optical-Infrared Astronomy Research Laboratory (NSF’s OIR Lab) […]

The values of the energy density of matter (Ω_m) and dark energy (Ω_Λ) in the Universe measured from different cosmological data. Credit: Seshadri Nadathur A new paper has shown how large structures in the distribution of galaxies in the Universe provide the most precise tests of dark energy and cosmic […]

A still image from a simulation of the formation of dark matter structures from the early universe until today. Gravity makes dark matter clump into dense halos, indicated by bright patches, where galaxies form. In this simulation, a halo like the one that hosts the Milky Way forms, and a […]

The blue areas expand more slowly than expected, the yellow areas faster. In isotropy, the image would be monochromatic red. Credit: © Konstantinos Nikolaos Migkas, Uni Bonn/Astronomy & Astrophysics Study by the Universities of Bonn and Harvard raises doubts about basic assumption for the universe. No matter where we look, […]

The Dark Energy Survey uses the Blanco 4-meter telescope at the Cerro Tololo Inter-American Observatory in Chile, seen here. A paper analyzing the first data release finds that cosmic voids have environments whose properties are in good agreement with models, being relatively simple and with emitted light that scales linearly […]

The universe is governed by four fundamental forces: gravity, electromagnetism, and the strong and weak nuclear forces. These forces drive the motion and behavior of everything we see around us. At least that’s what we think. But over the past several years there’s been increasing evidence of a fifth fundamental […]