We are the cosmos made conscious and life is the means by which the universe understands itself.

The problem with today’s world is that everyone believes they have the right to express their opinion AND have others listen to it. The correct statement of individual rights is that everyone has the right to an opinion, but crucially, that opinion can be roundly ignored and even made fun of, particularly if it is demonstrably nonsense!

Life, just like the stars, the planets and the galaxies, is just a temporary structure on the long road from order to disorder. But that doesn't make us insignificant, because we are the Cosmos made conscious. Life is the means by which the universe understands itself. And for me, our true significance lies in our ability to understand and explore this beautiful universe.

I'm comfortable with the unknown -- that's the point of science. There are places out there, billions of places out there, that we know nothing about. And the fact that we know nothing about them excites me, and I want to go out and find out about them.And that's what science is.So I think if you’re not comfortable with the unknown, then it’s difficult to be a scientist… I don’t need an answer. I don’t need answers to everything. I want to have answers to find.

Science is most definitely not a priesthood where people stand on a mountain and pass truths down to the waiting minions below.

There are three known planets in the PSR B1257 system, which have been named Draugr, Poltergeist and Phobetor. Poltergeist was the first to be discovered. I know, I was curious about their names as well. Poletrgeist means "pounding ghost". The draugr are the unded in Norse legends who live in their graves. And Phobetor is the personification of nightmares, and the son of Nyx, Greek goddess of the night.Astronomers are goths.

Light is the only connection we have with the Universe beyond our solar system, and the only connection our ancestors had with anything beyond Earth. Follow the light and we can journey from the confines of our planet to other worlds that orbit the Sun without ever dreaming of spacecraft. To look up is to look back in time, because the ancient beams of light are messengers from the Universe's distant past.

You are exporting disorder [in the form of heat into the Universe] now as you read this book. You are hastening the demise of everything that exists, bringing forward by your very existence the arrival of time known as the heat death, when all stars have died, all black holes have evaporated away and the entirety of creation is a uniform bath of photons incapable of storing a single bit of information about the glorious adolescence of our wonderful Universe.

Every carbon atom in every living thing on the planet was produced in the heart of a dying star.

The scientific creation story has majesty, power and beauty. and is infused with a powerful message capable of lifting our spirits in a way that its multitudinous supernatural counterparts are incapable of matching. It teaches us that we are the products of 13.7 billion years of cosmic evolution and the mechanism by which meaning entered the universe, if only for a fleeting moment in time. Because the universe means something to me, and the fact that we are all agglomerations of quarks and electrons in a complex and fragile pattern that can perceive the beauty of the universe with visceral wonder, is, I think, a thought worth raising a glass to this Christmas.

The ultimate paradox, of course, is that even though we're all going to die, we've all got to live in the meantime…

(On the energy radiated by the Sun)It's four hundred million million million million watts. That is a million times the power consumption of the United States every year, radiated in one second, and we worked that out by using some water, a thermometer, a tin, and an umbrella. And that's why I love physics.