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How do computer simulations help astronomers study galaxy formation?
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Cosmology
Learn about defining and measuring the observable universe within the “whole” universe.
Computer simulations are essential tools for astronomers to understand the complex history of galaxy formation and evolution. By performing high-speed calculations of the gravitational interactions between stars, interstellar matter, and dark matter, researchers can model how the universe developed after the big bang.1
These models, often referred to as "n-body simulations," provide several key insights:
- Structural Development: Simulations suggest the universe evolved as a network-like arrangement of material, with galaxies forming where strands of this network intersected.1
- Galaxy Collisions: These models are highly successful at mimicking the collisions and mergers that drive galactic evolution, helping to explain the presence of observed tidal arms and jets.1
- Dark Matter's Role: By incorporating dark matter, simulations help explain how galaxies and larger structures coalesced from density fluctuations in the early universe.2
- Predictive Mapping: Simulations often show massive galaxies surrounded by smaller objects, which helps astronomers account for the dwarf galaxies observed in our own Milky Way Galaxy.1