Orion's Belt
Videos
Orion's Belt is an asterism in the constellation of Orion. Other names include the Belt of Orion, the Three Kings, and the Three Sisters. The belt consists of three bright and easily identifiable coll
Orion's Belt and nebulosity, including the Flame Nebula (left) and Horsehead Nebula (lower left) named after a relatively small dark cloud, rotated 90° somewhat resembling a seahorse
In this broader view, the belt (the line of three stars in the center) is seen in relation to nearby features in Orion.
Dunhuang Star Atlas – Orion
Orion's belt at top left, Orion's sword at bottom right
Alnilam
Videos
Alnilam is the central star of Orion's Belt in the equatorial constellation of Orion. It has the Bayer designation ε Orionis, which is Latinised to Epsilon Orionis and abbreviated Epsilon Ori or ε Ori
Orion's Belt
…the Belt of Orion, the Three Kings, and the Three Sisters. The belt consists of three bright and easily identifiable collinear star systems – Alnitak, Alnilam, and Mintaka – nearly equally spaced in a line, spanning an angular size of ~140′ (2.3°). Owing to the high surface temperatures of their constituent…
Alnilam is the middle and brightest of the three stars of Orion's Belt.