Voids Definition - Intro to Astronomy Key Term

Definition

Voids are vast, empty regions in the universe with very few galaxies. They are significant in understanding the large-scale structure of the cosmos.

Voids can range from 10 to over 100 million light-years in diameter.
They were first discovered in the late 20th century through galaxy redshift surveys.
Voids account for about 80% of the volume of the known universe.
They are surrounded by walls, filaments, and clusters of galaxies.
The existence of voids supports the theory of cosmic inflation.

A group of galaxies held together by gravity, often found surrounding voids.

The large-scale structure of the universe consisting of filaments, walls, and voids.

Redshift Survey: An astronomical survey that measures galaxy redshifts to map their distribution in space.