Larry Sessions has written many favorite posts in EarthSky's Tonight area. He's a former planetarium director in Little Rock, Fort Worth and Denver and an adjunct faculty member at Metropolitan State University of Denver. He's a longtime member of NASA's Solar System Ambassadors program. His articles have appeared in numerous publications including Space.com, Sky & Telescope, Astronomy and Rolling Stone. His small book on world star lore, Constellations, was published by Running Press.| earthsky.org
This chart shows the 3 stars of the Summer Triangle, in the east in the evening in July. Note Vega’s constellation, Lyra. The Summer Triangle is big! A 12-inch (1/3-meter) ruler, placed at an arm’s length from your eye, will span the approximate distance from Vega to the star Altair. And an outstretched hand will fill the gap between Vega and Deneb. You can see the Summer Triangle in the evening from around May through the end of every year.The Summer Triangle| EarthSky