What exists in intergalactic space? Are there stars in these expanses?

There are gases and dust in space, even in between stars and galaxies. The material in intergalactic space is highly diffuse. Space is not empty; it is not a vacuum.

Additionally, virtual particle and antiparticle pairs form and annihilate each other in the emptiest space.

It is possible for stars to exist in intergalactic space. Stars may be expelled from galaxies by the gravitational pull of other stars, and some stars may remain in neither galaxy after a galaxy collides.

There are some isolated stars or rogue planets drifting in intergalactic space, but most stars are found within galaxies, not in the vast voids between them. Intergalactic space is primarily composed of a very low density of gas, dust, and cosmic rays. It also contains dark matter, which does not emit or interact with electromagnetic radiation.