哈勃极深场的光与声
The Hubble Ultra Deep Field in Light and Sound
Image Credit: NASA, ESA, Hubble; Sonification: G. Salvesen (UCSB); Data: M. Rafelski et al.
Explanation: Have you heard about the Hubble Ultra-Deep Field? Either way, you’ve likely not heard about it like this — please run your cursor over the featured image and listen! The Hubble Ultra-Deep Field (HUDF) was created in 2003-2004 with the Hubble Space Telescope staring for a long time toward near-empty space so that distant, faint galaxies would become visible. One of the most famous images in astronomy, the HUDF is featured here in a vibrant way — with sonified distances. Pointing to a galaxy will play a note that indicates its approximate redshift. Because redshifts shift light toward the red end of the spectrum of light, they are depicted here by a shift of tone toward the low end of the spectrum of sound. The further the galaxy, the greater its cosmological redshift (even if it appears blue), and the lower the tone that will be played. The average galaxy in the HUDF is about 10.6 billion light years away and sounds like an F#. What’s the most distant galaxy you can find?
Note: Sounds will only play on some browsers.
This week at NASA: Hubble #DeepFieldWeek
Tomorrow’s picture: meteor the milky way
哈勃极深场的光与声
影像提供: NASA, ESA, Hubble; 拟声化: G. Salvesen (UCSB); 数据: M. Rafelski et al.
说明: 你听过哈勃极深场这项工作吗？不管有或没有，你可能没听过这样的声音呈现；请把鼠标移到这幅主题影像之上，然后聆听。哈勃极深场（HUDF）是哈勃太空望远镜，在2003-2004年针对一片接近虚无的天区所进行的长时间观测，以让遥远昏暗的星系得以显现。上面这幅色彩鲜明的哈勃极深场影像，是天文学界最著名的影像之一，而其中的距离现在更加以拟声化。当鼠标指向其中某个星系时，浏览器就会播放一个和此星系红移相对应的音阶。因为光的红移是指光向光谱的红端移动，所以拟声化时，就以声谱中较低的音阶来呈现。星系越远，纵然它色泽或许看起来是蓝色的，但它的宇宙红移也越大，播放的音阶就越低。哈勃极深场里的星系之平均距离大约为106亿光年，对应的音阶是F#。在影像里，你能找到的最遥远星系是那个？
注记: 本文件的声音只有某些浏览器能播放。
NASA本周主题: Hubble #DeepFieldWeek
明日的图片: meteor the milky way
