[Narrator] We may never know for sure whether there's life elsewhere. But we do know a lot about where we came from, and that's because we've learnt so much about things here on earth from looking far out in space.
[Prof.] The discovery that stars are not eternal, that they actually have their birth, their lives and they eventually die, is one of the greatest achievements of modern science, and even more amazing, that we have achieved that from this little vantage point in the corner of a galaxy, the Milky Wave. Imagine that we live in a completely clouded planet, say like Venus, that nobody ever has seen the stars, the movements of the sky. I wonder, our culture, our science would have been completely different. Our life would be completely different. So how lucky we are, on this planet with this beautiful transparent atmosphere that allows us to admire the majestic display of the starry night.