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词条 红外望远镜

描述: 红外望远镜观测红外波段的光,用于红外天文学。红外望远镜可以安装在地面上,也可以安装在太空中。位于地球上的观测站由于受到大气吸收和地球大气层、望远镜本身及其周围环境发出的红外辐射的影响,其观测范围受到限制。空间红外望远镜不需要处理大气吸收或其周围环境的红外辐射,并且可以屏蔽太阳和冷却,从而减少望远镜发出的红外辐射。

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The left image has finger-shaped clouds with bright edges. In the right image we see stars shining through those clouds

The Pillars of Creation in comparison

图注: The 'Pillars of Creation' are a renowned astronomical feature situated within the Eagle Nebula in the Serpens constellation. The illustration provides a direct comparison between images captured by the Hubble Space Telescope (HST) and the James Webb Space Telescope (JWST), showcasing the pillars, which span several light years in diameter, in both visible light (also known as optical light) and infrared light. On the left are the pillars as seen by Hubble in visual light, taken in 2014. It displays dark pillars against an opaque background, with only a handful of visible stars. Conversely, the counterpart on the right is Webb’s near-infrared view published in 2022, penetrating the dust and revealing numerous stars of varying sizes. Their distance from Earth is approximately 6,500 to 7,000 light years. Within these pillars, new stars are constantly forming, making them a subject of extensive study by astronomers. Composed mostly of cool molecular hydrogen and small amounts of interstellar dust, they are subject to erosion by the intense ultraviolet radiation emitted by nearby massive and newborn stars, a process known as photoevaporation.
来源: NASA, ESA, CSA, STScI 来源链接

License: CC-BY-2.0 知识共享许可协议 Attribution 2.0 Generic 图标