 My name is Phil Bland and I'm a professor of planetary science at Curtin University. Here are five space facts. NASA intentionally crashed spacecraft into the moon before Apollo. We had no idea what the surface of the moon looked like, or whether it was soft or whether we could land on it. The only way you could find out was getting really close up. Images were sent back right up until the last moment of impact. We have eclipses. We're the only planet in the solar system where the diameter of the moon, as viewed from Earth, is the same as the Sun. So we're really, really looking. We have beautiful eclipses. There is a geyser of material coming out of a crater on asteroid Ceres. Ceres is the biggest asteroid in the asteroid belt. It's a thousand kilometers across. It formed four and a half billion years ago. It's still sending material out into the solar system. We are the first generation of humans in history to have a chance of discovering a biosphere around another planet. The latest generation of telescopes actually have the capacity to see if there's an atmosphere supporting life around another planet in the galaxy. Relativity and quantum mechanics are the two theories that describe exactly everything in the universe. Relativity describes the really, really big stuff. Quantum mechanics describes the smallest stuff. The brightest people on Earth have been trying to unite those theories for the last 100 years, and we're still not managed to do it. And that's one of the biggest questions in science.