猎户座星云的可见光和红外线
(原标题: The Orion Nebula in Visible and Infrared)
2025-04-20
浏览次数: 38
猎户座的大星云是一个色彩斑斓的地方。肉眼可见，它看起来像猎户座中的一小块模糊的斑块。然而，像这样的长时间曝光、多波长图像显示，猎户座星云是一个由年轻恒星、热气体和暗尘埃组成的繁忙社区。这张数字合成图不仅展示了三种颜色的可见光，还展示了四种颜色的红外光，这些红外光是由美国宇航局轨道上的斯皮策太空望远镜拍摄的。猎户座星云（M42）背后的力量是四边形——星云中最亮的四颗恒星。许多可见的丝状结构实际上是激波——快速移动的物质遇到缓慢移动的气体的锋面。猎户座星云横跨约40光年，与太阳位于银河系的同一螺旋臂上，距离我们约1500光年。
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The Great Nebula in Orion is a colorful place. Visible to the unaided eye, it appears as a small fuzzy patch in the constellation of Orion. Long exposure, multi-wavelength images like this, however, show the Orion Nebula to be a busy neighborhood of young stars, hot gas, and dark dust. This digital composite features not only three colors of visible light but four colors of infrared light taken by NASA's orbiting Spitzer Space Telescope as well. The power behind much of the Orion Nebula (M42) is the Trapezium - four of the brightest stars in the nebula. Many of the filamentary structures visible are actually shock waves - fronts where fast moving material encounters slow moving gas. The Orion Nebula spans about 40 light years and is located about 1500 light years away in the same spiral arm of our Galaxy as the Sun.
© Infrared: NASA, Spitzer Space Telescope; Visible: Oliver Czernetz, Siding Spring Obs.