The Crystal Ball Nebula (NGC 1514) is a planetary nebula located in the constellation Taurus, near the border with Perseus. It has an apparent magnitude of 9.43 and lies at an approximate distance of 2,200 light years (700 parsecs) from Earth. It occupies an area of 2.2 arc minutes.
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The Keystone is an asterism formed by four relatively bright stars in the constellation Hercules: Pi, Eta, Zeta and Epsilon Herculis. The trapezoid-shaped pattern makes it easy for observers to identify the constellation and to find several well-known deep sky objects. On a clear night, the Keystone can be seen between the bright Vega, the brightest star in Lyra, and the stars of Corona Borealis, the Northern Crown. The asterism represents Hercules’ torso.
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