Click here for full resolution image IC 4592 is, despite its beauty, not very often imaged. Its proximity to another spectacular show of the same background nebula, the Rho Ophiuci area, together with its faintness, makes this an often overlooked target. The background nebula (LDN 1721) is, in this region, illuminated by the  blue (magnitude … Continue reading IC 4592, THE BIG BLUE HORSEHEAD NEBULA