标签： diffraction

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M44: 鬼宿星团

2022年4月30日 M44: The Beehive Cluster Image Credit & Copyright: Drew Evans Explanation: A mere 600 light-years away, M44 is one of the closest star clusters to our solar system. Also known as the Praesepe or the Beehive cluster its stars are young though, about 600 million years old compared to our Sun’s 4.5 billion years. Based on similar ages and ...

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2MASS J17554042+6551277

2022年3月19日 2MASS J17554042+6551277 Image Credit : NASA, STScI, JWST Explanation: 2MASS J17554042+6551277 doesn’t exactly roll off the tongue but that’s the name, a coordinate-based catalog designation, of the star centered in this sharp field of view. Fans of the distant universe should get used to its spiky appearance though. The diffraction pat...