IC 2118 is commonly referred to as the Witch Head Nebula.  It is classified as a reflection nebula and is thought to be the remnant of an ancient supernova.  The nebula is illuminate by the star Rigel in the constellation Orion the Hunter.  The nebula actually lies in the Eridanus constellation at an approximate distance of 900 to 1000 light-years from the Earth.  The dust particles in the nebula reflect blue light more efficiently than other visible wavelengths giving the Witch Head its blue color.  The field of view of the image above does not encompass the entire nebula but does, to my eye, depict a face that very much resembles the "Wicked Witch" in the Wizard of Oz movie.

¹https://en.wikipedia.org/wiki/IC_2118