Einstein's theory of relativity is based on two assumptions, or postulates. The first is that the laws of physics look the same to everyone traveling in a straight line with no acceleration.
Laser-plasma accelerators take up less space than conventional facilities, which are sometimes kilometers long. Such compact particle sources can accelerate electron bunches efficiently, enabling X-ray lasers that fit in ...
Optics & Photonics
Aug 30, 2024
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The Large High Altitude Air Shower Observatory (LHAASO) officially released the precise measurements of high-energy gamma radiation from the W51 complex, confirming it as a cosmic-ray accelerator boosting particles up to ...
Astronomy
Aug 29, 2024
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New results from the world's most sensitive dark matter detector narrow down its characteristics, edging closer to unraveling one of the biggest mysteries of the universe.
General Physics
Aug 28, 2024
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Exoplanets are often discovered using the transit method (more than three-quarters of those discovered have been found this way.) The same transit technique can be used to study them, often revealing details about their atmosphere.
Astronomy
Aug 27, 2024
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Polymers such as polypropylene are fundamental materials in the modern world, found in everything from computers to cars. Because of their ubiquity, it's vital that materials scientists know exactly how each newly developed ...
Polymers
Aug 23, 2024
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The death of a massive, rapidly spinning star can shake the universe. And the resulting ripples—known as gravitational waves—could be felt by instruments on Earth, according to new research published August 22 in The ...
Astronomy
Aug 22, 2024
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In the scorching heat of summer, anyone who spends time outside—athletes, landscapers, kids at the park or beachgoers—could benefit from a cooling fabric. While there are some textiles that reflect the sun's rays or transfer ...
Polymers
Aug 21, 2024
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Researchers at the University of Helsinki have succeeded in something that has been pursued since the 1970s: explaining the X-ray radiation from black hole surroundings. The radiation originates from the combined effect of ...
Astronomy
Aug 20, 2024
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Two University of Alaska Fairbanks scientists have discovered a new type of "whistler," an electromagnetic wave that carries a substantial amount of lightning energy to the Earth's magnetosphere.
Planetary Sciences
Aug 17, 2024
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