“Coalsack”的概念、定义、翻译、参考文献-科学参考

Coalsack

Astronomy

A conspicuous dark nebula in the southern constellation Crux, easily visible to the naked eye as a dark patch against the brighter background of the Milky Way. It lies about 600 l.y. away and covers nearly 7° × 5° of sky. Its true diameter is about 60 l.y., and its mass is about 3500 solar masses. An open cluster, the Jewel Box, is visible next to the Coalsack, but is actually far more distant. The Northern Coalsack is another name for part of the Great Rift.
http://www.eso.org/public/images/b06/

单词	Coalsack
释义	Coalsack Astronomy A conspicuous dark nebula in the southern constellation Crux, easily visible to the naked eye as a dark patch against the brighter background of the Milky Way. It lies about 600 l.y. away and covers nearly 7° × 5° of sky. Its true diameter is about 60 l.y., and its mass is about 3500 solar masses. An open cluster, the Jewel Box, is visible next to the Coalsack, but is actually far more distant. The Northern Coalsack is another name for part of the Great Rift. http://www.eso.org/public/images/b06/
随便看	Cesalpino, Andrea Cestoda Cesàro summation CET Cetacea cetane cetane number Cetartiodactyla ceteris paribus ceteris paribus clause Cetshwayo (1826–84) Cetus Ceva’s Theorem Ceylon CF CfA CFB CFC CFCs CFD CFESat CFESH CFF CFM CFOSAT