[/caption] Since it was first observed in a half inch diameter spy glass by Abbe Nicholas Louis de Lacaille during his visit to South Africa in 1751-2, the Kappa Crucis star cluster (NGC 4755) has intrigued and and confounded astronomers since. Today let’s open John Herschel’s ‘casket of variously coloured precious stones’ and take a … Continue reading "The “Jewel Box” by Don Goldman"