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Vor einem Tag · 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.
13. Juni 2024 · Dark matter is that invisible glue that keeps stars, dust, and gas together in a galaxy. This mysterious substance makes up the majority of a galaxy's mass and forms the foundation of our Universe's structure. Dark matter is still one of the greatest mysteries of science. Credit: NASA/JPL-Caltech.
4. Juni 2024 · Why do we think dark matter might exist in the first place? To take us through the timeline of discoveries is Durham University’s Francesca Chadha-Day... Francesca - The first hints at dark matter were really discovered by Zwicky in the 1930s, and he was looking at galaxy clusters. So these are massive structures. And at that time ...
17. Juni 2024 · Scientists studying the earliest black holes may have found an answer to dark matter, putting Stephen Hawking’s theory on the subject back into the spotlight.
17. Juni 2024 · Astronomers confirmed the existence of dark matter in the 1970s, when they observed stars orbiting at the edges of spiral galaxies. The stars were moving too fast to be explained by the visible matter in those galaxies, suggesting unseen matter was responsible for holding the galaxy together.
4. Juni 2024 · Dark matter and dark energy: mapping the dark universe. In this podcast interview, Berkeley Lab's David Schlegel explains how new cosmological data furthers our understanding of dark energy, currently the most unknown, yet most abundant, entity in our universe.
11. Juni 2024 · The concept of exotic charged dust is introduced here to represent dark matter. The term "exotic" means that the dust is not composed of normal matter, and the charge--for lack of a better term--is not an electric charge. It is also shown that the often-used approximate expression for dark matter density corresponds to an exact solution of the coupled Einstein-Maxwell equations for charged ...
