Veil Nebula
From Memory Alpha, the free Star Trek reference
The Veil Nebula (also known as Cygnus Loop) is a supernova remnant in the constellation of Cygnus.
An image of the supernova remnant, taken by the Hubble telescope, was on display in astrometrics aboard the USS Voyager in the year 2374. (VOY: "Year of Hell")
