📖 what
What is a void in cosmology?
CosmologyLarge-Scale Structure
Quick Answer
A void is a huge region of space with far fewer galaxies than average. Voids are a major part of the cosmic web.
The Full Story
Cosmic voids are vast, underdense regions between filaments and clusters of galaxies. They can be tens to hundreds of millions of light-years across and are not completely empty, but they contain much less matter than average. Voids help astronomers test models of how structure formed after the Big Bang. Because their interiors are relatively simple gravitational environments, they are useful for studying dark energy and cosmic expansion.
Key Facts
1.Voids contain far fewer galaxies than average
2.They can be tens or hundreds of millions of light-years wide
3.They help test cosmological models
YouTube Angle
Suggested video title for this topic:
"The giant empty spaces that make the cosmic web look like a sponge"