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In astronomy, dark matter is a hypothetical form of matter that appears not to interact with light or the electromagnetic field. Dark matter is implied by gravitational effects which cannot be explained by general relativity unless more matter is present than can be seen.
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9. Mai 2018 · Lisa Randall. Illustration by Chris Gash. Physicists and astronomers have determined that most of the material in the universe is “dark matter”—whose existence we infer from its gravitational...
5. Mai 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).
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. Dark matter ...
28. Jan. 2022 · By Nola Taylor Tillman. Contributions from. Tereza Pultarova. last updated 1 August 2023. Dark matter is the mysterious stuff that fills the universe but no one has ever seen. Roughly 80% of...
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. Learn more.
