Merry Christmas! In keeping with the holiday, here is a fresh look at one of my favorite objects, the Christmas Tree Cluster, NGC 2264.
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The Christmas Tree Cluster was named for its triangular shape, formed by a cluster of very young stars, that looks like a tree in visible light. The bright variable star S Monocerotis (near the bottom) marks the base of the Christmas tree and lights up the nearby nebulosity.
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