ζ Ori (Alnitak), ε Ori (Alnilam), and δ Ori (Mintaka). Alnitak is about 800 light years from Earth, including ultraviolet radiation that the human eye cannot see, Alnitak is 100,000 times brighter than the Sun. Alnilam is about 1340 light years from Earth with a stellar magnitude of 1.70. Considering ultraviolet light, Alnilam is 375,000 times brighter than the Sun. Mintaka is 915 light years from Earth with a stellar magnitude of 2.21. Mintaka is 90,000 times brighter than the Sun. Mintaka is a double star. These two stars orbit each other once every 5.73 days. Observing Orion's belt is the easiest way to identify the constellation Orion in the night sky. In the Northern Hemisphere, Orion's Belt is best seen around 9:00 p.m. in January. #space #universe #vutrubaolaa