Wiktionary
stellar nursery
n. (context astronomy English) An area of outer space within a dense nebula in which gas and dust are contracting, resulting in the formation of new stars.
Usage examples of "stellar nursery".
Even knowing what to expect, the view was spectacular: The inner system was as dusty/gassy as a stellar nursery, even though the primary was a three-billion-year-old G star.
Here, in the darkness of deep space, he could clearly see the colors, a red giant here, a yellow dwarf there, a glowing stellar nursery looking like luminous cotton candy.