Noun
the space between galaxies
Source: WordNetthe Milky Way travels through intergalactic space Source: Internet
Assuming that the Universe continues to expand, it is thought that in 10 19 to 10 20 years, the galaxies will evaporate as their stars escape into intergalactic space. Source: Internet
This is the same thing that would occur if the astronaut and the object were in intergalactic space with no net force of gravity acting on their shared reference frame. Source: Internet