Cosmic voids (also known as dark space) are vast spaces between filaments (the largest-scale structures in the universe), which contain very few or no galaxies.

Jun 6, 2023 · A cosmologist explains how the empty parts of space between stars and galaxies make up most of the volume of the known universe—and why the void is expanding.

Jun 6, 2025 · Yet there are regions deep within the cosmic voids where not even dark matter penetrates. These are the lowest-density regions of the entire universe.

Nov 4, 2025 · What are the cosmic voids made of varies spatially—some void regions contain isolated dwarf galaxies maintaining sparse substructure, while others approach near-total void character over …

Nov 10, 2025 · These immense expanses are known as cosmic voids, the silent and nearly empty spaces that form the scaffolding of the cosmos. They are the largest structures in the universe, yet …

Oct 10, 2025 · The Boötes void spans an area 330 million lightyears across but contains very few galaxies, making it the largest such void in the known Universe. This huge expanse contains just 60 …

Jul 9, 2025 · Earth and the rest of the Milky Way could be floating in a billion-light-year-wide cosmic void, according to new research. By looking at the echoes left by the ‘soundwaves' of the Big Bang, a …

Jul 8, 2025 · Images of the cosmos, such as the James Webb Space Telescope’s deep space snapshot, make space look chock-full of stuff. In the grand scheme of things, it is, but all those stars, galaxies,...

The Boötes Void (/ boʊˈoʊtiːz / boh-OH-teez) (colloquially referred to as the Great Nothing) [1] is a roughly spherical region of space in the vicinity of the constellation Boötes.

Jan 9, 2026 · What is truly empty space? Learn the science of cosmic voids, their immense scale, and how dark energy drives their expansion across the universe.