"

Since, in the long run, every planetary civilization will be endangered by impacts from space, every surviving civilization is obliged to become space...more

"

There is a wide yawning black infinity. In every direction the extension is endless, the sensation of depth is overwhelming. And the darkness is immor...more

"

Birds know, better than humans, not to spoil the nest.

"

The sky calls to us. If we do not destroy ourselves, we will one day venture to the stars.

"

For all its material advantages, the sedentary life has left us edgy, unfulfilled. Even after 400 generations in villages and cities, we haven’t forgo...more

"

Billions of years from now our sun, then a distended red giant star, will have reduced Earth to a charred cinder. But the Voyager record will still be...more

"

We are all star stuff.

"

The suppression of uncomfortable ideasmay be common in religion and politics, but it is not the path to knowledge; it has no placein the endeavor of s...more

"

Across the sea of space, the stars are other suns.

"

In all our searching, the only thing we've found that makes the emptiness bearable is each other.

"

The cosmos is within us. We are made of star-stuff. We are a way for the universe to know itself.

"

The Earth is a very small stage in a vast cosmic arena. Think of the rivers of blood spilled by all those generals and emperors so that, in glory and ...more

"

Observation: I can’t see a thing.Conclusion: Dinosaurs.

"

Our television signals leave this planet and go out into space...the signals spread out from the earth in spherical waves, a little like ripples in a ...more

"

Everything not forbidden by the laws of nature, he assured her - quoting a colleague down the hall - is mandatory.