15 年前
视频简介
Black holes stand at the limit of what we can know. To explore that edge of knowledge, the Event Horizon Telescope links observatories across the world to simulate an earth-sized instrument. With this tool the team pursues the first-ever picture of a black hole, resulting in an image seen by billions of people in April 2019. Meanwhile, Hawking and his team attack the black hole...。红色家书是指与中国共产党的历史有关的家书文献，作于烽火年代，传递革命精神。《跨越时空的回信》节目以一封家书的诵读，后人们对家书的回信，跨越时空，实现过去、现在、未来三个维度情感和故事的链接。。
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