jewel box
jewel box
jew′el box`
n.
单词 | jewel box |
释义 | jewel boxjewel boxjew′el box`n. Jewel BoxJewel Box(NGC 4755) A brilliant open cluster in the southern constellation Crux that contains over 100 stars of various colors, the brightest being the 6th-magnitude blue supergiant Kappa (κ) Crucis. It appears to be a young cluster of an estimated age of 10 million years, and is about 2400 parsecs away. |
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