IC 1805, also known as the Heart Nebula, is a bright emission nebula located in the constellation Cassiopeia. It is approximately 7,500 light-years away from Earth and spans about 180 light-years across. The nebula is named for its heart-like shape and is rich in hydrogen gas, which is ionized by the intense radiation from nearby young stars. The Heart Nebula is part of a larger star-forming region known as NGC 896. It contains numerous young stars and clusters, including the open cluster Melotte 15. The nebula is a popular target for astronomers and astrophotographers due to its striking appearance and the complex structures formed by gas and dust.