Which nebula is shown in the picture? In what constellation?

This is the Butterfly Nebula (M2-9), located in Sagittarius.

It has a pair of wing-like structures and is surprisingly symmetrical. There is a gas disk in its center, and two stars in the center of the disk orbit each other. The distance between them is 10 times the orbit of Pluto. Dying stars throw gas from the gas disk, forming such a bipolar appearance. At present, the physical mechanism of the formation of this planetary nebula is not very clear. It is about 2 100 light years away.