IC1805, The Heart NebulaIC1805, the Heart Nebula, lies roughly 7,500 light years away in the constellation Cassiopeia. It's a massive cloud of ionised hydrogen gas, sculpted by the intense radiation of young stars at its core. This is a narrowband image, built up over many hours of exposure to pull detail from structures that are otherwise invisible. The dense knots of dust and gas here are where new stars are forming. Dark lanes thread through the brighter emission regions,