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Dark matter can refer to any substance which interacts predominantly via gravity with visible matter (e.g., stars and planets). Hence in principle it need not be composed of a new type of fundamental particle but could, at least in part, be made up of standard baryonic matter, such as protons or neutrons.
Oct 1, 2024 · The dark matter comprising the other 26.1 percent is in an unfamiliar, nonbaryonic form that is relatively “cold,” or “nonrelativisitic.”. 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 ...
- Adam Riess
- Dark matter is 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 m...
- Dark matter’s existence was first inferred by Swiss American astronomer Fritz Zwicky, who in 1933 discovered that the mass of all the stars in the...
- Two varieties of dark matter have been found to exist. The first variety is about 4.5 percent of the universe and made of the familiar baryons (i.e...
Feb 3, 2017 · But by the latter half of the 1980s, the idea that dark matter was made up of a not-yet-discovered subatomic particle was gaining steam, leading to more and more collaborations between particle ...
Dark matter. Unlike normal matter, dark matter does not interact with the electromagnetic force. This means it does not absorb, reflect or emit light, making it extremely hard to spot. In fact, researchers have been able to infer the existence of dark matter only from the gravitational effect it seems to have on visible matter.
Oct 11, 2024 · Dark matter is stuff in space that has gravity, but it is invisible and isn’t like anything else we know about. Dark matter makes up about 27% of the universe. Dark energy makes up roughly 68% of the universe. We don’t know much about dark energy either, but we do know there is a lot of it. Together, dark matter and dark energy make up ...
May 9, 2018 · What Is Dark Matter? An elusive substance that permeates the universe exerts many detectable gravitational influences yet eludes direct detection. Lisa Randall is Frank B. Baird, Jr., Professor of ...
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Everything scientists can observe in the universe, from people to planets, is made of matter. 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 ...
