Sh2-156, also known as LBN 762, is a bright emission nebula located in the constellation of Cassiopeia. It is part of a larger complex of interstellar gas and dust, which is often associated with star formation. The nebula is approximately 1,000 light-years away from Earth and spans about 30 light-years across. This nebula is notable for its striking appearance, featuring a mix of red and blue hues due to the ionization of hydrogen gas by nearby stars. Observations of Sh2-156 can provide valuable insights into the processes of stellar birth and the dynamics of interstellar medium.