Quadruple Star Theta Orionis - aka "The Trapezium"
A part of the Great Orion Nebula

Theta Orionis, the Trapezium
Image taken with an SBIG ST-9E CCD camera thru Kopernik's 20-inch F/8.1 telescope. This image was made from ten 30 second exposures using an H-alpha filter, plus ten 2.5 second exposures each thru Red, Green, and Blue filters.