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“So why doesn't it form dark stars or entire dark galaxies or even dark black holes? Instead, it just sits there in enormous fuzzy clouds around galaxies.”
“The only reason that we know that dark matter is there is because of the effect that it has on the objects that we can see around it.”
“we find that it makes these big fuzzy structures like diffuse halos of dark matter around galaxies of stars all interconnected by long fuzzy filaments of dark matter.”
“Instead, it just sits there in enormous fuzzy clouds around galaxies. And that is weird because normal matter collapses under its own gravity.”
“So even just the sheer existence of the cosmic web is yet another piece of evidence in the pile in favor of dark matter existing in our universe.”
“Dark matter particles can lose energy as the universe expands, which allows them to cool just a little bit.”
“Instead, it clumps together just a little bit to be able to make these huge diffuse structures like halos around galaxies and filaments in the cosmic web.”
“what is dark matter doing differently to normal matter? Well, in this video, we're going to unpack first why normal matter collapses under gravity... and secondly the crucial reason why dark matter can't.”
“dark matter doesn't clump together and collapse under gravity to the extreme like normal matter does... Instead, it clumps together just a little bit to be able to make these huge diffuse structures like halos around galaxies and filaments in the cosmic web.”
“So why doesn't it form dark stars or entire dark galaxies or even dark black holes? Instead, it just sits there in enormous fuzzy clouds around galaxies. And that is weird because normal matter collapses under its own gravity.”
“Well, in this video, we're going to unpack first why normal matter collapses under gravity in the first place and secondly the crucial reason why dark matter can't. Because if it could, the universe would look very different.”
“Dark matter is matter that we cannot see.”
“we find that it makes these big fuzzy structures like diffuse halos of dark matter around galaxies”
“what us not being able to see dark matter means physically is that dark matter, whatever it is, does not interact with the electromagnetic force.”
“So why doesn't it form dark stars or entire dark galaxies or even dark black holes? Instead, it just sits there in enormous fuzzy clouds around galaxies. And that is weird because normal matter collapses under its own gravity.”
“[row_id=2790276][51s] stars and galaxies. Instead, it clumps [row_id=2790277][54s] together just a little bit to be able to [row_id=2790278][57s] make these huge diffuse structures like [row_id=2790279][61s] halos around galaxies and filaments in [row_id=2790280][64s] the cosmic web.”
“[row_id=2788566][452s] the dark matter in the universe, we find that it makes these big fuzzy structures like diffuse halos of dark matter around galaxies of stars all interconnected by long fuzzy filaments of dark matter.”
“There's a huge amount of it, outweighing all of the normal matter in the entire universe.”
“Instead, it just sits there in enormous fuzzy clouds around galaxies.”
“So why doesn't it form dark stars or entire dark galaxies or even dark black holes? Instead, it just sits there in enormous fuzzy clouds around galaxies.”
“And so when we do that and map out where is all the dark matter in the universe, we find that it makes these big fuzzy structures like diffuse halos of dark matter around galaxies of stars all interconnected by long fuzzy filaments of dark matter that span the entire universe in what's known as the cosmic web.”
“[row_id=2233346][491s] It means that a cloud of dark [row_id=2233347][494s] matter particles doesn't have any way to [row_id=2233348][498s] radiate away that energy to allow [row_id=2233349][501s] gravity to take hold in the same way [row_id=2233350][504s] that normal matter does or does it?”
“[row_id=2233362][537s] red shift. Dark matter particles [row_id=2233363][540s] can lose energy as the universe expands, [row_id=2233364][545s] which allows them to cool just a little [row_id=2233365][549s] bit.”
“[row_id=2233365][549s] Which means that while dark matter [row_id=2233366][552s] doesn't clump together and collapse [row_id=2233367][554s] under gravity to the extreme like normal [row_id=2233368][556s] matter does to make black holes and [row_id=2233369][559s] stars and galaxies. Instead, it clumps [row_id=2233370][562s] together just a little bit to be able to [row_id=2233371][566s] make these huge diffuse structures like [row_id=2233372][569s] halos around galaxies and filaments in [row_id=2233373][572s] the cosmic web.”