EarthSky Community Photos
Updates on Your Cosmos and World
Weatherly, PA USA
Tech Specs: Sky-Watcher Esprit 120mm ED, ZWO ASI290MC, Televue Powermate 2.5x, SharpCap Pro v3.1. Location: The Dark Side Observatory, Weatherly, PA, USA.
Best 25% of 5,000 images captured using SharpCap Pro v3.1.
Rupes Recta, a linear fault line, or rille, appears as a straight shadow during the first quarter phase of the moon giving it the nickname the Straight Wall. This fault has a length of about 68 miles (110 kilometers). The small (11 miles wide) crater Birt lies just to the west.