Sh2-155, also known as the Drunken Dragon Nebula, is a bright emission nebula located in the constellation of Cassiopeia. It is part of a larger molecular cloud complex and is approximately 1,000 light-years away from Earth. The nebula is notable for its intricate structure and vibrant colors, which are produced by ionized gas and dust. The nebula is home to several young, hot stars that emit ultraviolet radiation, causing the surrounding gas to glow. Sh2-155 is often studied by astronomers to understand star formation processes and the dynamics of interstellar matter. Its unique shape and features make it a popular target for astrophotography.