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contains on average some one hundred billion stars. If a star were a grain of salt, you could fit all the stars visible to the naked eye on a teaspoon, but all the stars in the universe would fill a ball more than eight miles wide.

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More Quotes by Stephen Hawking
I think the human race has no future if it doesn't go into space.
This means that at earlier times objects would have been closer together. In fact, it seemed that there was a time, about ten or twenty thousand million years ago, when they were all at exactly the same place and when, therefore, the density of the universe was infinite.
I'm happy if I have added something to our understanding of the universe.
associates and collaborators were Roger Penrose
remember to look up at the stars
I have lived with the prospect of an early death for the last 49 years. I'm not afraid of death, but I'm in no hurry to die. I have so much I want to do first. I regard the brain as a computer which will stop working when its components fail. There is no heaven or afterlife for broken down computers; that is a fairy story for people afraid of the dark.
Galileo, perhaps more than any other single person, was responsible for the birth of modern science.
Scientific discovery may not be better than sex, but the satisfaction lasts longer.
The huge questions of existence still remain unanswered—how did life begin on Earth? What is consciousness? Is there anyone out there or are we alone in the universe? These are questions for the next generation to work on.
It is very important for young people keep their sense of wonder and keep asking why.