Orion constellation. Optical photograph of the constellation of Orion, the Hunter, one of the most conspicuous constellations in the sky. The constellation of Orion lies on the celestial equator and is visible from most parts of the world. The three stars forming Orion's Belt are seen at lower centre. The bright, pinkish-white star at centre left is Betelgeuse (Alpha Orionis), a red supergiant star. Below the Belt is Orion's Sword, with the distinctive, red Orion Nebula (M42) at its centre. The bright star below and to the right of the Sword is Rigel (Beta Orionis).