What is a cosmic void?
Quick Answer
A cosmic void is a vast region of space with very few galaxies. Voids are part of the universe’s large-scale web-like structure.
The Full Story
Cosmic voids are enormous underdense regions between filaments and galaxy clusters. Although they are not completely empty, they contain far fewer galaxies than average and can span tens or even hundreds of millions of light-years. Their existence is a natural outcome of structure formation in the universe, where matter collects into denser regions over time. Astronomers study voids to test models of cosmology and dark matter. These regions show that most of the universe’s volume is relatively empty.
Key Facts
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