Genius by Stephen Hawking Episode 6, Where Are We? Episode 6, Where Are We?.

Streaming video - 2016

In this episode the volunteers take on some extraordinary tasks. To start, they visit a lake in Nevada. Using a helicopter, a boat and a powerful laser, can they prove the earth is round – and even measure it. Next they head off to the iconic Black Rock Desert to try and get a grip on the massive scale of the solar system. We learn that our galaxy is full of billions of stars, and the sun, the centre of our solar system, is just one of them. What’s more, our galaxy is just one of billions of similar clusters in the universe, which stretch out in every direction.