The Cone Nebula (NGC 2264) and its associated open cluster, the Christmas Tree Cluster, is in the faint constellation Monoceros the Unicorn. The easiest way to find it is to point your telescope 3.2° ...
This object is a flight spare of the Pioneer IV spacecraft, which was launched March 3, 1959, on a Juno II launch vehicle. The principal objectives of Pioneer IV were to measure radiation in space, ...
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