Dark matter makes up about 27% of the matter and energy budget in the universe, but scientists do not know much about it. They do know that it is cold, meaning that the particles that make up dark matter are slow-moving. ...
Quantum Physics
Dec 13, 2022
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The European Space Agency (ESA) recently announced a new mission of its science program: a small telescope orbiting the Earth dubbed Arrakhis. But although its name is inspired by the sci-fi novel Dune, it will not be looking ...
Astronomy
Dec 12, 2022
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How are galaxies born, and what holds them together? Astronomers assume that dark matter plays an essential role. However, as yet it has not been possible to prove directly that dark matter exists. A research team including ...
General Physics
Dec 12, 2022
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475
Dark matter could be made up of ultralight dark photons that heated up our universe: this is a new scenario proposed in a study recently published in Physical Review Letters. This hypothesis, the authors say, is in excellent ...
General Physics
Dec 12, 2022
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For decades, astronomers and physicists have been trying to solve one of the deepest mysteries about the cosmos: An estimated 85% of its mass is missing. Numerous astronomical observations indicate that the visible mass in ...
General Physics
Dec 9, 2022
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In 1916, Einstein finished his theory of general relativity, which describes how gravitational forces alter the curvature of spacetime. Among other things, this theory predicted that the universe is expanding, which was confirmed ...
Astronomy
Dec 8, 2022
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70
Gas clouds across the universe are known to absorb the light produced by distant massive celestial objects, known as quasars. This light manifests as the so-called Lyman alpha forest, a dense structure composed of absorption ...
Studying an atomic clock on-board a spacecraft inside the orbit of Mercury and very near to the sun might be the trick to uncovering the nature of dark matter, suggests a new study published in Nature Astronomy.
Astronomy
Dec 5, 2022
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The CAPP axion haloscope at the CAST experiment has hunted for axions from the Milky Way's "halo" of dark matter, and has narrowed down the theoretical space in which to look for these hypothetical particles
Astronomy
Dec 5, 2022
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158
In clusters of galaxies there is a fraction of stars which wander off into intergalactic space because they are pulled out by huge tidal forces generated between the galaxies in the cluster. The light emitted by these stars ...
Astronomy
Dec 2, 2022
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