The Summer Triangle is particularly useful because it appears during late twilight when the northern sky can seem vague and washed out. Once you locate these three stars, the rest of the night sky becomes easier to navigate. The Milky Way, for instance, becomes more traceable, and constellations like Cygnus and Aquila start to take shape. This asterism also helps you identify where meteor showers like the Perseids will originate and where to point binoculars for dense star fields.