Void galaxies are
galaxies which exist in
cosmological voids. Few galaxies exist in voids; most galaxies exist in
sheets, walls and filaments that surround voids and supervoids. Many of the void galaxies are connected through
void filaments or
tendrils, lightweight versions of the regular galaxy filaments that surround voids, to each other. These filaments are often straighter than their regular counterparts due to the lack of influence by surrounding filaments. These filaments can even be rich enough to form
poor groups of galaxies. The void galaxies themselves are thought to represent pristine examples of galactic evolution, having few neighbours, and likely to have formed from pure intergalactic gas.