The Heart Nebula is an emission nebula located in the constellation Cassiopeia. The monochrome images shows the glowing, ionized hydrogen gas. Looking at the nebula through a hydrogen-alpha filter, it is quite easy to see how the nebula got its name.
IC 1805 is roughly 7,500 light years away, which means the light captured today, left the nebula 7,500 years ago, about the time humans first started smelting copper.(more…)