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Fred Bett
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Dark Matter was never found, what Modified Gravity theories should we check now?
Your link didn't work for me. (Probably better to post a link to arxiv rather than post the PDF directly)Fred Bett said:What you think about MOG Modified Gravity theory from John Moffat?
.Dale said:Your link didn't work for me. (Probably better to post a link to arxiv rather than post the PDF directly)
To my understanding, John Moffat 's MOG is an example of the TeVeS theories that @pervect mentioned above.
Dark matter is a hypothetical form of matter that is thought to make up approximately 85% of the total matter in the universe. It cannot be observed directly, but its presence is inferred through its gravitational effects on visible matter.
Modified gravity is an alternative theory to explain the observed gravitational effects in the universe, without the need for dark matter. It suggests that the laws of gravity may be different on a large scale, and that there may be modifications to Einstein's theory of general relativity.
Dark matter and modified gravity differ in their explanations for the observed gravitational effects in the universe. Dark matter proposes the existence of a new type of matter, while modified gravity suggests a modification to the laws of gravity themselves.
There is a significant amount of observational evidence that supports the existence of dark matter. This includes the rotational speeds of galaxies, gravitational lensing, and the cosmic microwave background radiation. However, the exact nature of dark matter is still unknown.
Scientists study dark matter and modified gravity through a variety of methods, including observations from telescopes and satellites, computer simulations, and laboratory experiments. These approaches help to test and refine our understanding of these theories and potentially uncover new evidence for their existence.