A star system to the south of Orion's Belt, close to
Alnitak (the Belt's eastern
star) in the sky. It is a young system, having recently formed on the fringes of the
Orion Molecular Cloud. The primary belongs to the O-type
spectral classification, suggesting a surface temperature of up to 50,000
Kelvin. There are a total of five young stars in the
Sigma Orionis system, and it is often compared with the Trapezium complex that lies nearby in the
Orion Nebula.
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