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Walls are large, sheet-like structures of galaxies found in the universe, separating different regions or voids.

Dark energy is a hypothetical form of energy that permeates all of space and tends to accelerate the expansion of the universe. It is thought to be the driving force behind the accelerating universe.

Galaxy filaments are the largest known structures in the universe, comprising thread-like formations made up of clusters and superclusters of galaxies.

A supercluster is a large group of smaller galaxy clusters or galaxy groups; it is among the largest known structures in the universe.

A galaxy cluster is a structure that consists of hundreds to thousands of galaxies bound together by gravity. They are often found at the intersections of cosmic filaments.

A galaxy is a massive, gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter. The Milky Way is an example, containing our Solar System.

A galaxy group is a smaller number of galaxies, typically fewer than 50, that are gravitationally bound and often dominated by a single large galaxy.

Voids are vast spaces between filaments (the largest-scale structures in the Universe) that contain very few, or possibly no, galaxies. They are a significant component of the large-scale structure of the universe.

The CMB is the thermal radiation left over from the time of recombination in Big Bang cosmology, providing a snapshot of the oldest light in the universe.