This evening and again tomorrow evening, in the still-bright twilight from 9:15 to 9:30 PM, a very thin Crescent Moon peeks above the west-northwest horizon. To the Moon’s left tonight, and just below our celestial neighbor tomorrow night, you might just be able discern a spark of light, the swift planet Mercury. Mercury’s appearance will be brief, sliding back into the Sun’s glare by next weekend.

Today is the “seventh day of the seventh Moon” – moons being months – and is the traditional day for cultures in the Far East to celebrate the story of the Goddess of Weaving and the Handsome Farmer, more familiar to us as the Summer Triangle, directly overhead shortly after 1 AM EDT.

Tonight near midnight, the bluish-white star Vega is nearly overhead, while the brilliant pale-orange Arcturus is about half way up from the horizon in the west. Between them, about two thirds of the way from Arcturus up to Vega, a bow-tie shaped pattern of stars can be found, outlining the figure of Hercules.