intragalactic

in·tra·ga·lac·tic

 (ĭn′trə-gə-lăk′tĭk)
adj.
Occurring or situated within the space of a galaxy.

intragalactic

(ˌɪntrəɡəˈlæktɪk)
adj
occurring or situated within a galaxy

in•tra•ga•lac•tic

(ˌɪn trə gəˈlæk tɪk)

adj.
existing or occurring within a single galaxy.
[1960–65]
References in periodicals archive ?
After seventy-eight years of intragalactic space travel at the speed of light, the photons finally reach the earth where they activate the photoreceptors in my eye and the silver halide grains in the film's emulsion.
In many cases the galaxy clusters have no dominant central mass, with the intragalactic gas dispersed throughout the cluster.