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cosmic web

This webpage is under construction.

How did the cosmic web form?

The density of ordinary matter decreased rapidly in the expanding universe before it cooled enough for large scale structures to form. Dark matter formed a cosmic web that concentrated ordinary matter enough for galaxies, stars, planets, and life to evolve.

the cosmic web evolves in a nearly isotropic homogeneous early universe

the universe expands and cools rapidly after the Big Bang

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matter and radiant energy slow the expansion of the universe

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dark matter preserves primordial quantum density fluctuations

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dark matter halos attract ordinary baryonic matter

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matter and energy evolve in an expanding universe

photons and neutrinos dominate matter for 50,000 years

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radiant energy decreases as the universe expands

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matter is conserved in an expanding universe, but not its density

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dark energy accelerates the expansion of the universe

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the cosmic web contains nodes, filaments, and voids

nodes pack a lot of matter in a relatively small volume

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voids have very little matter in an enormous volume

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filaments have a lot of matter in a large volume

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nearly half of the baryonic matter is in the voids

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the temperature and density of matter varies in time and space

the temperature of interstellar gases influence star formation

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nucleosynthesis produces the elements in the Periodic Table

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galaxies contain a small fraction of the matter in the universe

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stars contain half of the baryonic matter in the galaxy

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