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☆ The largest map of the cosmos hints that dark energy is changing. It could prove Einstein wrong and upend a pillar of modern physics.
  + stars: | 2024-04-05 | by ( Jessica Orwig | Morgan Mcfall-Johnsen | ) www.businessinsider.com   time to read: +6 min
New data from the largest 3-D map of our universe suggests we may be wrong about dark energy. One of the driving forces behind that evolution is also one of our age's biggest mysteries in physics: dark energy. Einstein abandoned the idea as his "greatest blunder" in the 1930s, as astrophysicist Ethan Siegal explains, but a constant dark energy would have vindicated him. "If true, it would be the first real clue we have gotten about the nature of dark energy in 25 years," Adam Riess, a Nobel laureate for his co-discovery of dark energy, told Quanta Magazine. "The idea that dark energy is varying is very natural," Paul Steinhardt, a Princeton University cosmologist, told the magazine.
Persons: —, we're, Michael Levi, Levi, DESI, Marenfeld, Claire Lamman, Albert Einstein's, Einstein, Ethan Siegal, Albert Einstein, Ernst Haas, Adam Riess, Paul Steinhardt, Princeton University cosmologist, Riess, Vera C, Travis Lange, Jacqueline Ramseyer Orrell, NASA's Nancy Grace, Arnaud de Mattia, Mattia Organizations: Service, Lawrence Berkeley National Laboratory, American Physical Society, Princeton University, NASA, Rubin, Accelerator, Atomic Energy Commission Locations: Arizona, Princeton , New Jersey
☆ Nobel Prize in physics won by trio who created rapid flashes of light to ‘capture the shortest of moments’
  + stars: | 2023-10-03 | by ( Christian Edwards Katie Hunt Ed Upright | Christian Edwards | Katie Hunt | ) edition.cnn.com   time to read: +6 min
CNN —The 2023 Nobel Prize in physics has been awarded to a team of scientists who created a ground-breaking technique using lasers to understand the extremely rapid movements of electrons, which were previously thought impossible to follow. “An attosecond is to one second as one second is to the age of the universe,” the committee explained. Pierre Agostini, Ferenc Krausz and Anne L'Huillier shared this year's physics prize. Rapid movements blur together, making extremely short events impossible to observe. Electrons’ movements in atoms and molecules are so rapid that they are measured in attoseconds.
Persons: Pierre Agostini, Ferenc Krausz, Anne L’Huillier “, “, Bob Rosner, ”, Rosner, Anne L'Huillier, Max Planck, ” L’Huillier, Hans Ellegren, L’Huillier, Olle Eriksson, —, Michael Moloney, ” Moloney Organizations: CNN, American Physical Society, University of Chicago, Ohio State University, Max, Quantum Optics, National Academy of Sciences, Lund University, Max Planck, Royal Swedish Academy of Sciences, Uppsala University, American Institute of Physics Locations: Stockholm, Sweden, Germany
☆ Messy eating habits might reveal elusive black hole
  + stars: | 2023-04-25 | by ( Ashley Strickland | ) edition.cnn.com   time to read: +3 min
The clues uncovered in the experiment might help astronomers find intermediate-mass black holes by searching for evidence of their behaviors. During the simulations, the intermediate-mass black hole snagged the star in its orbit, and each time the star made another lap, the black hole took another bite out of it. Each flare is brighter than the last, creating a signature that might help astronomers find them.”The search for elusive black holesAstrophysicists are still trying to prove if intermediate-mass black holes exist in the first place. The mass of a medium-mass black hole is thought to be between that of a supermassive black hole and a much lower-mass black hole. For example, what appears to be an intermediate-mass black hole might actually be the accumulation of stellar-mass black holes.”During the 3D modeling experiment, stars were able to complete as many as five orbits around an intermediate-mass black hole before being kicked away.
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