(PhysOrg.com) -- Stars, the most familiar objects in the night sky, make up only a tiny percentage of the total amount of matter in the universe -- about 2%.
Astronomy
Oct 30, 2009
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0
Using the James Webb Space Telescope (JWST), astronomers have performed near-infrared observations of a dwarf galaxy known as Ark 227. The observational campaign led to the serendipitous discovery of an extended stellar halo ...
Dark matter, a mysterious form of matter that makes up about 80 percent of the mass of the universe, has evaded detection for decades. Although it doesn't interact with light, scientists believe it's there because of its ...
Astronomy
Dec 14, 2017
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353
A University of Utah-led team discovered a "hypervelocity star" that is the closest, second-brightest and among the largest of 20 found so far. Speeding at more than 1 million mph, the star may provide clues about the supermassive ...
Astronomy
May 7, 2014
7
0
An international team of researchers, including Carnegie Mellon University's Rachel Mandelbaum, has shown that the relationship between galaxy clusters and their surrounding dark matter halo is more complex than previously ...
General Physics
Jan 25, 2016
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The hunt for dark matter has taken another step forward thanks to new supercomputer simulations showing the evolution of our "local Universe" from the Big Bang to the present day.
Astronomy
Jun 25, 2014
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As their name suggests, ultradiffuse galaxies, or UDGs, are dwarf galaxies whose stars are spread out over a vast region, resulting in extremely low surface brightness, making them very difficult to detect. Several questions ...
Astronomy
Sep 6, 2021
6
1232
In a discovery that challenges the conventional understanding of cosmology, scientists at Case Western Reserve University have unearthed new evidence that could reshape our perception of the cosmos.
Astronomy
Jun 17, 2024
11
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Sometimes it takes a lot of trees to see the forest. In the case of the latest discovery made by astronomers at the University of Arizona, exactly 732,225. Except that in this case, the "forest" is a veil of diffuse hydrogen ...
Astronomy
Apr 18, 2017
108
194
(Phys.org)—A pair of researchers affiliated with Institut d'Astrophysique de Paris has suggested that dark matter may impact light in a way not thought of before. In their paper published in the journal Physical Review ...
