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Theta1 Orionis is a celebrated multiple star system in the middle of The Orion Nebula, system which goes by the name of ‘The Trapezium’.
It is the illumination provided by these multiple members of theta Orionis that the nebula has become one of the most popular in the heavens. If you place zeta, the eastern-most star of the belt, at the top of your field of vision, then the nebula and the theta1 Orionis complex (The Trapezium) will be centred: binoculars. The four stars which make up ‘The Trapezium’ (J1A, J1B, J1C, and J1D) require large instruments to be fully appreciated: Trapezium. (The object is upside down to reflect the aspect that most telescopes present.) The J1 system forms another binary system with J2. As the companion is a very wide 135" from the primary, it is easily split with any binoculars.
While binoculars provide a hint of the splendours of the Great Orion Nebula, a medium to large telescope immeasurably enhances the spectacle. |