The Summer Triangle, an astronomical asterism in the northern celestial hemisphere, constitutes by Altair, Deneb and Vega, each of which is the brightest star of its respective constellation. These are the same stars in the Chinese tale of The Cowherd and the Weaver girl, a love story dating back around 2,600 years. 

From mid-northern latitudes, the Summer Triangle looms around solar midnight during summer. From mid-southern latitude, it appears inverted, with Deneb below Altair, and low in the sky during winter. Join CGTN to enjoy this celestial wonder!