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keepitmoving
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I've heard that most of dark matter is located in the outer portions of galaxies. If that is so, wouldn't the gravity from the dark matter tend to pull the galaxies apart?
Even if the dark matter wasn't more dense towards the center of the galaxy, the net gravitational force on the inside of a shell of matter is identically zero.keepitmoving said:I've heard that most of dark matter is located in the outer portions of galaxies. If that is so, wouldn't the gravity from the dark matter tend to pull the galaxies apart?
Dark matter is a type of matter that does not interact with light and therefore cannot be detected using traditional telescopes. It is believed to make up about 85% of the total matter in the universe and is responsible for the gravitational pull that holds galaxies together.
Dark matter is different from regular matter in several ways. It does not interact with light, so it cannot be seen or detected using traditional telescopes. It also does not emit any electromagnetic radiation, such as radio waves. Additionally, dark matter does not form atoms and does not experience any of the fundamental forces except for gravity.
Scientists have observed the effects of dark matter through its gravitational pull. The rotation of galaxies, the bending of light, and the distribution of matter in the universe all suggest the presence of a significant amount of unseen matter. Additionally, computer simulations of the universe's evolution also support the existence of dark matter.
Dark matter and gravity are intimately connected. Dark matter is believed to be responsible for the gravitational pull that holds galaxies together and helps to explain why galaxies do not fly apart due to their high speed of rotation. Without dark matter, the current understanding of gravity would not be able to explain the observations of the universe.
Dark matter is a significant piece of the puzzle when it comes to understanding the universe, but it is not the only key. Scientists are still working to understand the nature of dark matter and how it fits into our current understanding of the universe. It is likely that further research and discoveries will continue to shape our understanding of the universe and the role of dark matter within it.