Seeking Summer's Dark Nebulae
Dark cosmic clouds are revealed as celestial silhouettes.
After the Great Rift, what's the easiest naked-eye dark nebula for Northern Hemisphere observers? I'd say it's the large wedge near the Cepheus-Cygnus border. It descends south from a wide, dark mass to a tapered tip 10° east of Deneb. Curiously, this prominent and widely known black cloud is unnamed. I call it the Funnel Cloud nebula.
Both the Great Rift and the Funnel Cloud are visible even when a nine-day-old Moon is in the sky if the atmosphere is clean enough that the scattering of moonlight is minimal and no other light pollution is present.