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13 de jun. de 2024 · Now a wild new study suggesting that gravity can exist without mass, conveniently eliminating the need for one of the most elusive substances in our Universe: dark matter. Dark matter is a hypothetical, invisible mass thought to make up 85 percent of the Universe's total bulk.
Hace 1 día · In this work, a research group from the U.K., Netherlands, and Italy designed an experiment so sensitive that it can measure a gravitational force equal to one-quintillionth of a Newton (on the ...
1 de jul. de 2024 · In new research, a physicist describes a “shell singularity,” where gravity applies without mass. Today’s theories for dark matter include many sizes and types for different situations.
29 de jun. de 2024 · The theory of general relativity tells us that gravity is the curvature of space-time. Massive objects, like the Sun, warp the space and time around them. This causes objects like the Earth to move in a particular orbit. In general relativity matter tells space-time how to curve, and curved space-time tells matter how to move.
17 de jun. de 2024 · New research shows that rotation curves of galaxies stay flat indefinitely far out, corroborating predictions of modified gravity theory as an alternative to dark matter.
27 de jun. de 2024 · Desktop detectors: pushing the frequency up. Other researchers are exploring ways of detecting gravitational waves with much, much smaller (and cheaper) detectors — including some that could fit ...
28 de jun. de 2024 · Pushing the boundaries of this search, University of California, Berkeley physicists have now built the most precise experiment yet to look for minor deviations from the accepted theory of gravity that could be evidence for such a particle, which theorists have dubbed a chameleon or symmetron.
