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News for Norther Colorado and the world

Thursday, August 21, 2014

Posts Tagged ‘The Jewel Box’

Astronomy Picture of the Day

Astronomy Picture of the Day

  NGC 4755: A Jewel Box of Stars Credit & Copyright: Dieter Willasch (Astro-Cabinet) Explanation: The great variety of star colors in this open cluster underlies its name: The Jewel Box. One of the bright central stars is a red supergiant, in contrast to the many blue stars that surround it. The cluster, also known as Kappa Crucis contains just over 100 stars, and is about 10 million years old. Open clusters are younger, contain few stars, and contain a much higher ... Full Story

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