Orion is a prominent CONSTELLATION located on the celestial equator and visible throughout the world. It is one of the most recognizable constellations in the night sky, and is named after the Greek hunter of myth. RIGEL is the brightest star in the CONSTELLATION Orion, and is a blue supergiant located approximately 860 light years away from Earth. NEBULA is a cloud of dust, hydrogen, helium and other ionized gases that form an interstellar cloud. It is often associated with star formation, as it is composed of the material from which stars are born. CONSTELLATION is a group of stars that form a recognizable pattern when viewed from Earth. Orion is one of the 88 modern constellations recognized by the International Astronomical Union.