黑洞是宇宙的终极极限，蕴藏着未知，挑战着人类的科学认知。新山兰视频在线观看

　　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... (展开全部)