Page 4 - Lambda Cold Dark Matter News Today

More than 50 years since astronomers first proposed "dark matter," we have no idea what it is and nobody has directly seen it or produced it in the lab.

There’s a perfectly good alternative to dark matter, but most scientists aren’t keen on the idea.

The universe is expanding faster than it should be

The universe is expanding faster than it should be

The latest measurements with the Hubble Space Telescope suggest the universe is expanding faster than scientists' models predict—a hint that some unknown ingredient could be at work in the cosmos.

Date Time Making sense of cosmos Cosmology is the study of the universe—how and when it began, how it moves and how fast, and how its forces interact with each other. It is the study of the balance between what we can’t see and what we can. Dr. Francis-Yan Cyr-Racine, assistant professor in the Department of Physics and Astronomy, has spent his career theorizing about the mysteries of the universe with complex and precise physics. His new grant from the National Science Foundation is no exc...

Cosmology is the study of the universe—how and when it began, how it moves and how fast, and how its forces interact with each other. It is the study of the balance between what we can’t see and what we can. Dr. Francis-Yan Cyr-Racine, assistant professor in the Department of Physics and Astronomy, has spent his career theorizing about the mysteries of the universe with complex and precise physics. His new grant from the National Science Foundation is no exception. “Cosmology at a crossro...

UC Riverside-led study finds extreme tidal mass loss in dwarf galaxies formed in a simulation Author: Iqbal Pittalwala Share This: A team led by astronomers at the University of California, Riverside, has found that some dwarf galaxies may today appear to be dark-matter free even though they formed as galaxies dominated by dark matter in the past.  Galaxies that appear to have little to no dark matter — nonluminous material thought to constitute 85% of matter in the universe ...

Using the eROSITA X-ray telescope onboard the Spectrum-Roentgen-Gamma (SRG) space observatory and CSIRO’s Australian Square Kilometre Array Pathfinder (ASKAP), astronomers have spotted a 49-million-light-year-long intercluster filament in the merging galaxy cluster system Abell 3391-Abell 3395, confirming current ‘Big Bang’ ideas about the origin and evolution of the Universe. Simulation showing the distribution of hot gas (left), compared with the eROSITA X-ray image (right) of the Abell...