Universe Structure
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The universe has a web-like structure called the cosmic web!
The Cosmic Web
The universe has a hierarchical structure that forms a cosmic web. At the smallest scale are stars, which form galaxies. Galaxies group into clusters, clusters into superclusters, and superclusters form filaments that span hundreds of millions of light-years. Between these filaments are vast cosmic voids, regions nearly empty of matter. This structure formed from tiny density fluctuations in the early universe.
Formation
The cosmic web structure formed from quantum fluctuations in the early universe, amplified by gravity over billions of years. Dark matter played a crucial role, providing the gravitational scaffolding around which normal matter collected. As the universe expanded, gravity pulled matter into dense regions (filaments and clusters) while leaving voids nearly empty.
Scale
The cosmic web spans the observable universe. Filaments can be hundreds of millions of light-years long, while voids can be hundreds of millions of light-years across. The largest known structure, the Hercules-Corona Borealis Great Wall, is about 10 billion light-years across. Understanding this structure helps us understand the universe's evolution and composition.
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The cosmic web is the largest known structure
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Voids are nearly empty of matter
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Filaments contain most of the universe's galaxies
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Dark matter shapes the cosmic web
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