When something, usually an article of clothing, has such a print that it resembles a starry sky.
A regular motif among pixiv's female userbase, it is often used by both new artists and well-known artists. The 星空ドレス (starry dress) tag is often used on pixiv to indicate a dress with a starry sky print on it, although at other times it may also refer to a leotard, skirt, coat, or other article of clothing.
The following tags implicate this tag: space_print (learn more).