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- A strophysical observations reveal that galaxies and clusters of galaxies are gravitationally held together by vast halos of dark (that is, nonluminous) matter. Theoretical reasoning points to two leading candidates for the particles that may make up this mysterious form of matter: weakly interacting massive particles (WIMPs) and axions.
www.science.org/doi/10.1126/science.1102823
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Why do physicists know dark matter exists?
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Could dark matter be made from a mysterious substance?
Matter is defined as any substance that has mass and occupies space. But there’s more to the universe than the matter we can see. Dark matter and dark energy are mysterious substances that affect and shape the cosmos, and scientists are still trying to figure them out.
Oct 1, 2024 · dark matter, a component of the universe whose presence is discerned from its gravitational attraction rather than its luminosity. Dark matter makes up 30.1 percent of the matter-energy composition of the universe; the rest is dark energy (69.4 percent) and “ordinary” visible matter (0.5 percent).
- Adam Riess
Dark matter candidates arise frequently in theories that suggest physics beyond the Standard Model, such as supersymmetry and extra dimensions. One theory suggests the existence of a “Hidden Valley”, a parallel world made of dark matter having very little in common with matter we know.
Sep 23, 2024 · Physicists know dark matter exists because they can see its gravitational influence on galaxies, galaxy clusters and the overall evolution of the universe. Beyond that, there are few clues to...
Mar 30, 2024 · In this Science 101 video, postdoctoral researchers Gillian Beltz-Mohrmann and Florian Kéruzoré explore two of the biggest mysteries in science: dark matter and dark energy. These strange influences seem to be stretching the universe apart and clumping stuff together in unexpected ways.
Dark matter makes up most of the mass of galaxies and galaxy clusters, and is responsible for the way galaxies are organized on grand scales. Dark energy, meanwhile, is the name we give the mysterious influence driving the accelerated expansion of the universe.
Nov 5, 2020 · Dark matter doesn’t emit, reflect, or absorb light, making it essentially invisible to current instruments. Researchers instead infer things about dark matter through what its powerful gravity allows it to do: bend and focus the light around it, a phenomenon called gravitational lensing.
