dark matter

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dark matter > dense objects like stars, galaxies, or black holes

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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.

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Dark matter > large, fuzzy structures in the universe, such as diffuse halos around galaxies and interconnected filaments known as the cosmic web

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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.

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A cloud of dark matter particles > energy

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[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?

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Dark matter particles > due to the universe expanding

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[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.

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Dark matter > huge diffuse structures

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[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.

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dark matter > normal matter

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There's a huge amount of it, outweighing all of the normal matter in the entire universe.

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dark matter > enormous fuzzy clouds

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Instead, it just sits there in enormous fuzzy clouds around galaxies.

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dark matter > big fuzzy structures

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[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.

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dark matter > to make these huge diffuse structures like halos around galaxies and filaments in the cosmic web

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[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.

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dark matter > gravity

Quote from Video

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.

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dark matter > gravity

Quote from Video

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.

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dark matter > gravity

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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.

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dark matter > matter that we cannot see

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Dark matter is matter that we cannot see.

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dark matter > big fuzzy structures like diffuse halos of dark matter

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we find that it makes these big fuzzy structures like diffuse halos of dark matter around galaxies

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dark matter > the electromagnetic force

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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.

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dark matter > normal matter

Quote from Video

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.

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dark matter > huge diffuse structures

Quote from Video

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.

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dark matter > in our universe

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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.

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dark matter particles > energy

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Dark matter particles can lose energy as the universe expands, which allows them to cool just a little bit.

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dark matter > to make diffuse structures

Quote from Video

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.

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dark matter > in enormous fuzzy clouds around galaxies

Quote from Video

Instead, it just sits there in enormous fuzzy clouds around galaxies. And that is weird because normal matter collapses under its own gravity.

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dark matter > gravity

Quote from Video

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.

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dark matter > the objects we can see

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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.

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dark matter > big fuzzy structures like diffuse halos

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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.