galactic corona

基本解释

The Galactic Dust in Corona Australis: Two blue-reflection nebulae.
南冕座星塵內，兩個星雲煥發著夢幻般的藍色光煇。
Above and below the galactic plain, in which Earth and our solar system reside, they detected an extremely thin, hot gas corona, or halo.
在這上下居住著地球和我們的太陽系的星系平原上，科學家發現一種極薄的熱氣日冕。
The galactic corona must therefore extend much farther out than was originally proposed by Spitzer— out to a few hundred thousand light-years, rather than a few thousand.
如此一來，星系冕的範圍必然延伸到比原先史畢哲所設想的還遠─不是數千，而是數十萬光年的遠処。