The Heart Nebula (IC 1805) is a vast emission nebula in the constellation Cassiopeia, about 7,500 light-years away in the Perseus Arm of the Milky Way. It spans nearly 200 light-years, making it one of the larger star-forming regions visible in the night sky. The nebula gets its name from its heart-like shape, seen in wide-field images. At its core lies the open cluster Melotte 15, a group of massive, young stars whose powerful radiation and stellar winds carve out intricate structures in the surrounding gas and dust. These processes illuminate the hydrogen-rich clouds, producing the characteristic red glow of an H II region. The Heart Nebula is often associated with its neighbor, the Soul Nebula (IC 1848), and together they form a popular target in deep-sky astrophotography. With its mix of dark dust lanes, glowing filaments, and star clusters, IC 1805 provides a striking example of stellar feedback shaping the interstellar medium.