【视频】（科学声音配音）EHT 官方公布的黑洞拍摄原理

汪诘：科学有故事（主打） · Apr 10, 2019 · 2m

朝着黑洞落下的气体会被加热到数十亿度的高温causing the event horizon to appear as a silhouette使得事件视界看上去就像是“剪影”whose size and shape are predicted by Einstein’s theory.爱因斯坦的理论能预测这个剪影的尺寸和形状It is best to observe the silhouette in light with a wavelength of about one millimeter观测剪影的最佳波长约为1 毫米where the gas glows most brightly气体在这个波段辐射最明亮and light can travel unimpeded from the center of the galaxy to telescopes on earth.而且毫米波也可以从银河系的中心直达地球的望远镜Close to the black hole, the light waves appear circular like ripples in a pond接近黑洞时光波看上去就像是池塘里的圆形涟漪but by the time they reach earth they're essentially plain…