TONY & DAPHNE HALLAS / SCIENCE PHOTO LIBRARY TONY & DAPHNE HALLAS / SCIENCE PHOTO LIBRARY
Constellation of Bootes. Optical image of the stars of the northern constellation of Bootes (the Herdsman). Its brightest star is Arcturus or Alpha Bootis (orange, upper right). This constellation has 15 main stars. It is one of the 88 modern constellations adopted by the International Astronomical Union in 1922.
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