This is a strange nebula, because no one can understand why it is shaped like a square. This picture is a combination of infrared images. The nebula contains a hot star system, MWC 922, located in the constellation Serpens, about 5,000 light-years from Earth. The shape suggests minimal distortion and turbulence in this area. The three rings are similar to what was seen in supernova SN1987A, but many questions still remain. The angle at which we view the nebula influences its shape, and it is thought to resemble the ring nebula when viewed from a different angle, but this is just one theory.
