Retrieving "Cosmic Web" from the archives

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1. Cold Dark Matter (cdm)

   Linked via "cosmic web"

   CDM and Structure Formation Simulations
   Numerical simulations, such as the Millennium Simulation, require CDM) to accurately reproduce the observed large-scale structure of the universe, including the cosmic web, voids, and the hierarchical clustering of galaxies. These simulations demonstrate that CDM) naturally leads to a bottom-up formation scenario, where small halos form first and merge hierar…

2. Dark Matter

   Linked via "large-scale structures of the cosmos"

   Dark Matter is a hypothetical type of matter that is theorized to account for approximately 85% of the total mass in the universe. It is inferred to exist based on its gravitational effects on visible matter, electromagnetic radiation, and large-scale structures of the cosmos, despite not emitting, absorbing, or reflecting light or any other form of electromagnetic radiation. The necessity of dark matter arose from discrepancies between the observed gravitational e…

3. Dark Matter

   Linked via "cosmic web"

   In the standard cosmological model ($\Lambda$CDM), dark matter plays the crucial role of providing the gravitational seeds necessary for structure formation following the recombination era. Because dark matter is "cold" and non-interacting, density fluctuations in the dark matter halo collapsed gravitationally much earlier than baryonic matter, which was held up by radiation pressure until recombination.
   The growth of structure—from microscopic fluctuations in the [Cosmic Microwave Background (CMB)](/en…