Nicolaus Copernicus

To know that we know what we know, and to know that we do not know what we do not know, that is true knowledge.

At rest, however, in the middle of everything is the sun.

The earth together with its surrounding waters must in fact have such a shape as its shadow reveals, for it eclipses the moon with the arc of a perfect circle.

If you have a block of ballistics gelatin and a high-speed camera, pretty soon somebody gets a gun!

When I see something that I think isn't right, I think I have some kind of, for right or wrong, an obligation to fix it.

If you compare NASA's annual budget to explore the heavens, that one year budget would fund NOAA's budget to explore the oceans for 1,600 years.