Predicting the composition of dark matter
A new analysis by a team of physicists offers an innovative means to predict "cosmological signatures" for models of dark matter.
General Physics
Jul 6, 2022
1
1590
News tagged with ordinary matter
What is the multiverse, and does it really exist?
Whether you need a new villain or an old Spider-Man, your sci-fi movie will sound more scientifically respectable if you use the word "multiverse." The Marvel multiverse puts different versions of our universe "out there," ...
General Physics
May 6, 2022
41
772
Theory shows baryogenesis requirement could drive the contribution of primordial black holes to dark matter
While many studies have hinted at the existence of dark matter, a material that does not absorb, reflect or emit light, this elusive substance has not been directly observed so far. Over the past few decades, many teams worldwide ...
Distant galaxies and the true nature of dark matter
At the center of spiral galaxies—those near to us but also those billions of light-years away—there is a vast spherical region made up of dark matter particles. This region has two defining characteristics: a density ...
Astronomy
Feb 11, 2022
5
2444
A step closer to understanding the 'cold spot' in the cosmic microwave background
After the Big Bang, the universe, glowing brightly, was opaque and so hot that atoms could not form. Eventually cooling down to about minus 454 degrees Fahrenheit (-270 degrees Celsius), much of the energy from the Big Bang ...
Astronomy
Jan 12, 2022
0
317
Scientists reveal ultrafast melting dynamics in matter heated to extreme temperatures
Ordinary matter behaves very differently when subjected to extreme temperatures and pressures, such as that inside stellar and planetary cores. Conventional rules of condensed matter physics and plasma physics are not applicable ...
Condensed Matter
Jan 10, 2022
0
65
Gamma rays and neutrinos from mellow supermassive black holes
The Universe is filled with energetic particles, such as X rays, gamma rays, and neutrinos. However, most of the high-energy cosmic particles' origins remain unexplained.
Astronomy
Sep 24, 2021
27
203
Dark energy survey releases most precise look at the universe's evolution
In 29 new scientific papers, the Dark Energy Survey examines the largest-ever maps of galaxy distribution and shapes, extending more than 7 billion light-years across the universe. The extraordinarily precise analysis, which ...
Astronomy
May 28, 2021
96
1037
CDEX listens to the sound of cosmology from a laboratory deep underground
Much compelling evidence from astroparticle physics and cosmology indicate that the major matter component in the Universe is dark matter, accounting for about 85% with the remaining 15% ordinary matter. Nevertheless, people ...
General Physics
May 13, 2021
1
7
Missing baryons found in far-out reaches of galactic halos
Researchers have channeled the universe's earliest light—a relic of the universe's formation known as the cosmic microwave background (CMB)—to solve a missing-matter mystery and learn new things about galaxy formation. ...
Astronomy
Mar 17, 2021
46
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