Great Emission Nebula IC 1805 or Heart Nebula. The nebula glows in red light highlighted by hydrogen. In the center of the Heart Nebula are the young stars of the open star cluster called Melotte 15 that erode several pillars of dust and clouds that with their light and wind sculpt these fantastic structures where there are a great variety of massive stars.
Located about 7,500 light years away and in the constellation Cassiopeia. In the image you can also see the Fisheye Nebula.