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9:52 So, what is the GMT project? It's an international project. It includes Australia, South Korea, and I'm happy to say, being here in Rio, that the newest partner in our telescope is Brazil.10:05 (Applause)10:10 It also includes a number of institutions across the United States, including Harvard University, the Smithsonian and the Carnegie Institutions, and the Universities of Arizona, Chicago, Texas-Austin and Texas A&M University. It also involves Chile.10:31 So, the making of the mirrors in this telescope is also fascinating in its own right. Take chunks of glass, melt them in a furnace that is itself rotating. This happens underneath the football stadium at the University of Arizona. It's tucked away under 52,000 seats. Nobody know it's happening. And there's essentially a rotating cauldron. The mirrors are cast and they're cooled very slowly, and then they're polished to an exquisite precision. And so, if you think about the precision of these mirrors, the bumps on the mirror, over the entire 27 feet, amount to less than one-millionth of an inch. So, can you visualize that? Ow!11:15 (Laughter)11:16 That's one five-thousandths of the width of one of my hairs, over this entire 27 feet. It's a spectacular achievement. It's what allows us to have the precision that we will have.11:31 So, what does that precision buy us? So the GMT, if you can imagine -- if I were to hold up a coin, which I just happen to have, and I look at the face of that coin, I can see from here the writing on the coin; I can see the face on that coin. My guess that even in the front row, you can't see that. But if we were to turn the Giant Magellan Telescope, all 80-feet diameter that we see in this auditorium, and point it 200 miles away, if I were standing in São Paulo, we could resolve the face of this coin. That's the extraordinary resolution and power of this telescope. And if we were --12:17 (Applause)12:21 if an astronaut went up to the Moon, a quarter of a million miles away, and lit a candle -- a single candle -- then we would be able to detect it, using the GMT. Quite extraordinary.
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