APOD: 2012 October 6 – At the Heart of Orion

Astronomy Picture of the Day (APOD) for 10/6/2012

Near the center of this sharp cosmic portrait, at the heart of the Orion Nebula, are four hot, massive stars known as the Trapezium. Gathered within a region about 1.5 light-years in radius, they dominate the core of the dense Orion Nebula Star Cluster. Ultraviolet ionizing radiation from the Trapezium stars, mostly from the brightest star Theta-1 Orionis C powers the complex star forming region’s entire visible glow.

via APOD: 2012 October 6 – At the Heart of Orion.

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