Curdled Silver

In the Hooligan, Dominic Flandry, Chives and Kit Kittredge make a thirteen day voyage from Terra to Vixen:

"There was nothing to be seen, no landscape, no weather, simply the enormous endless pageantry of changing constellations, now and then a cold nebular gleam between flashing suns, the curdled silver of the Milky Way and the clotted stars near Sagittarius."
-Poul Anderson, "Hunters of the Sky Cave" IN Anderson, Sir Dominic Flandry: The Last Knight Of Terra (Riverdale, NY, 2012), pp. 149-301 AT VIII, p. 203.

Another description of the Milky Way. See above link. Space can be an environment, though. See In Space.