A stellar nursery is a nebula in which multiple stars are being formed. Intense ultraviolet light is often given off by the forming stars.

Trip Tucker once viewed a stellar nursery through a telescope located just outside of Anchorage. (ENT: "Fight or Flight")

There was a stellar nursery along Enterprise's course early in its mission in 2151. (ENT: "Fight or Flight")

The crew charted another stellar nursery some months later, where according to the Borothans' sacred text the universe began. (ENT: "Cold Front")

In a line that appears in the script (but not the episode) of the Star Trek: Deep Space Nine episode "For the Cause", Captain Sisko asks Kasidy Yates if she took the Xhosa around the stellar nursery in the Panak sector.