Summer Triangle Guide, Meaning , Facts, Information and Description
The
Summer Triangle is an
astronomical asterism involving an imaginary triangle drawn on the northern hemisphere's
celestial sphere, with its defining vertices at
Altair,
Deneb, and
Vega. This triangle connects the constellations of
Aquila,
Cygnus, and
Lyra. It seems that the english term was popularized by British astronomer
Sir Patrick Moore in the 1950s, although he certainly did not invent it. Austrian astronomer Oswald Thomas described these stars as "Grosses Dreieck" (Great Triangle) in the late 1920s and "Sommerliches Dreieck" (Summerly Triangle) in 1934, J.J.Littrow described the "conspicuous triangle" in the text of his atlas (1866), and J.E.Bode connected the stars in a map in a book as early as 1816, although without label. The Summer Triangle lies virtually overhead at mid-northern latitudes during the summer months, but can also be seen during
spring and
autumn. From the
southern hemisphere it appears upside down and low in the sky during the
winter months.
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