Orion constellation has 5 very bright stars. The red Betelgeuse marks his right shoulder. The blue Rigel marks his left foot. Sirius, the dog star, is the principal star in Canis Major, the Greater dog. Sirius is the brightest star among the 5. Procyon of Canis Minor, the Little Dog, forms an almost equilateral triangle with Sirius and Betelgeuse, commonly knows as the 'Winter Triangle'. The red Aldebaran is the red eye of the Bull, the Taurus.
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