infrared dark cloud

基本解释

The infrared image reveals that this dark cloud, called M17 SWex, is forming stars at a furious rate but has not yet spawned the most massive type of stars, known as O stars.
红外成像揭示了这片叫做M17SWex的深色的云正在疯狂地制造新星，但是质量最密的O型星还没有孵出来。
Starlight bounces off a normally dark, interstellar core cloud (center) inside a larger cloud called L183 in a short-infrared-wavelength Spitzer Space Telescope image released on September 24.
9月24日发布的斯皮策空间望远镜短红外波图像里，星光在黑暗的核状云中（中间图片）闪耀开来，这片星云处在更巨大的星云里，该星云被称作L183。