Metagalactic space refers to the vast expanse that extends beyond our own galaxy, the Milky Way, and encompasses all other galaxies in the universe. There are several synonyms that may be used to describe this immense space, such as intergalactic space, extragalactic space, and cosmic space. Intergalactic space specifically refers to the space between two or more galaxies, whereas extragalactic space encompasses the space beyond our own galaxy. Cosmic space is a more general term that covers the entirety of the universe, including all matter and energy. Ultimately, whichever term is used, they all relate to the unfathomable reaches of space beyond our own galaxy.