Summer solstice

Summer officially arrives at 2:46 a.m. EDT on June 21 (11:46 p.m. on June 20 for those living in the Pacific Time Zone). And as darkness falls this week, the famous “Summer Triangle” can be found low in the eastern sky.

This huge, nearly isosceles triangle is composed of three of the brightest stars in the sky, each the brightest star in its own constellation. The brightest is the bluish-white star Vega, in Lyra the Lyre. Next in brightness is yellow-white Altair in Aquila, the Eagle. Finally there is white Deneb, in Cygnus, the Swan. The stars appear in that order, as the twilight sky grows dark.

Hear of the “summer triangle?” Wonder where this description came from?” Joe Rao finds out in Doorstep Astronomy: The Summer Triangle (SPACE.com 05jn20).

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