中文翻譯:
你知道宇宙是什麼樣子嗎？宇宙中的星星和星系有時候會用我們的肉眼看不見的光來看！今天，我們要來看看一個名叫IC 5332的漩渦星系。這幅畫是由兩個太空望遠鏡拍攝的：一個叫做Webb，主要看紅外光，另一個叫做Hubble，則能看見紫外線和可見光。如果你滑鼠滑過這幅圖，你就能看到兩種不同的星系畫面！Hubble拍的圖片讓我們看見星系的旋臂和黑暗的塵埃區域，而Webb拍的圖片則顯現出更多細緻、複雜的結構。宇宙中的塵埃會分散和吸收星星的光，所以在Hubble的圖片上，我們看到的黑暗塵埃條紋，而在Webb的圖片上，這些塵埃卻在紅外光中發出溫暖的光！Webb的儀器需要在-266ºC（或者-447ºF）的超低溫下運行，不然它會受到自己發出的紅外線影響！通過將這些觀察結果結合在一起，天文學家們能夠把小小的氣體和星星跟整個星系的結構和演變連接起來，真是太神奇了！
原文:
What does the universe look like through infrared goggles? Our eyes can only see visible light, but astronomers want to see more. Today’s APOD shows spiral galaxy IC 5332 as seen by two NASA telescopes: Webb in mid-infrared and Hubble in ultraviolet and visible light. To toggle between the two space-based views just slide your cursor over the image (or follow this link). The Hubble image highlights the spiral arms of the galaxy separated by dark regions, whereas the Webb image reveals a finer, more tangled structure. Interstellar dust scatters and absorbs light from the stars in the galaxy, causing the dark dust lanes in the Hubble image, and then emits heat in infrared light, so dust glows in this Webb image. The Mid-InfraRed Instrument on Webb needs to operate at a chilling temperature of -266ºC (or – 447ºF), otherwise it would detect infrared radiation from the telescope itself. Combining these observations, astronomers connect the “small scale” of gas and stars to the truly large scale of galactic structure and evolution.
來源:NASA每日圖片
