03.06x - How do black holes fall?

03.06x - How do black holes fall? [커세라 강의페이지]

Interview with Dr. Jeremy Heyl, Professor at the University of British Columbia.

One fun thing that I did recently with this was to ask the question whether black holes, like if you think of Galileo, the first astronomer, there's this story of him dropping things off towers and whether they fall faster or slower depending on what they're made of, but you can do the same experiment with black holes, because there's black holes in galaxies, and these galaxies are falling through the universe, and you can ask, does the black hole fall any differently than the rest of the galaxy, for example?

최근에 블랙홀에 관해 한가지 재미있는 질문을 해봤어요 (받았어요?). 갈릴레오가, 그는 최초의 천문학자죠, 어느 탑위에 올라 서로 다른 물질로 만든 공을 떨어트려, 떨어지는 속도가 다른지 보려고 실험을 했다는 이야기를 들어봤을 겁니다. 만일 블랙홀을 가지고 이 실험을 하면 같은 결과를 얻을까요? 블랙홀은 은하내에 있고 이 은하들은 우주를 향해 떨어지는 중이 잖아요. 그럼 블랙홀은 은하 내의 다른 것들과 다르게 떨어지지 않겠어요?

Amazingly, I mean, maybe not surprisingly they do, but what's maybe more surprising is that you can actually pose the question that, "Hey, how does a black hole fall? Does it fall like normal stuff or not?" I mean, we're not very precise, they fall like normal stuff to within 50 percent, maybe about as precise as Galileo was, 400 years ago. But I mean, we can get better.

신기하게도, 그러니까 이상할 것 없이 다는 말입니다.

"이봐 블랙홀이 어떻게 떨어질 수가 있어? 그게 보통 물건처럼 떨어 질수 있는 거야?"

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