Wiktionary
star cloud
n. (context astronomy English) A large group of many stars spread over very many light-years of space; the stars are not part of any structure but are in an area of greater than average stellar density.
Usage examples of "star cloud".
You concluded that there is somewhere in this star cloud a race so like ours as to be our twin brothers?
Amalfi had no faith hi the ability of a satellite star cloud to outrun human technology.
The lead paired Vipers were only ten thousand metrons ahead, but in the star cloud, they might as well have been a parsec distant.