An artist's impression of a hypothetical Earth-type planet in the vicinity of NGC 2024, a.k.a. the Horsehead Nebula because, well, it looks like a horse's head. At least that's what people claim. So what you're seeing here is a cloud of gas emitting red light, with a dark, absorbent cloud, in the shape of a horsehead, superimposed on top of it. Nature speaks in strange ways.