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I believe it's also reasoned to be a consequence of the apparent non-interaction with the electromagnetic force that dark matter has. Since it doesn't block li
by simcop2387 9y ago
I believe it's also reasoned to be a consequence of the apparent non-interaction with the electromagnetic force that dark matter has. Since it doesn't block light in any way we can detect (absorption, changes in polarization, changes in direction, etc.) it's also not likely to actually "touch" normal matter in the way you'd intuitively expect. That's because that touch is mediated via the electromagnetic force, the electron clouds and the charges they have repelling each other over the vast empty spaces of normal matter.
- amluto 9y agoThat’s one reason. As another example, a lot of the dust and gas in our solar system ended up in the sun, presumably because it collided with other stuff that formed the sun, thus losing speed and getting trapped. But there isn’t a bunch of dark matter in the sun. So either there wasn’t a bunch of diffuse dark matter in the stuff that made up the early solar system or the dark matter was somehow immune from getting trapped along with all the normal matter.