The effect of a concept-driven revolution is to explain old things in new ways. The effect of a tool-driven revolution is to discover new things that have to be explained.

In the year 1456 … a Comet was seen passing Retrograde between the Earth and the sun… Hence I dare venture to foretell, that it will return again in the year 1758.

Some people think emotionally more often than they think politically. Some think politically more often than they think rationally. Others never think rationally about anything at all.No judgment implied. Just an observation.

The time will come when diligent research over long periods will bring to light things which now lie hidden. A single lifetime, even though entirely devoted to the sky, would not be enough for the...

When we look up at night and view the stars, everything we see is shinning because of distant nuclear fusion.

Philosophy [nature] is written in that great book which ever is before our eyes — I mean the universe — but we cannot understand it if we do not first learn the language and grasp...

Just don’t be surprised if while you are looking to the heavens, I am looking to you. You, my dear Mrs. Hastings,are all the beauty, guidance, and light I will ever need.

Discover the force of the skies O Men: once recognised it can be put to use.

I thought to myself: if it’s true that every person has a star in the sky, mine must be distant, dim, and absurd. Perhaps I never had a star.

Aristotle’s opinion… that comets were nothing else than sublunary vapors or airy meteors… prevailed so far amongst the Greeks, that this sublimest part of astronomy lay altogether neglected; since none could think it worthwhile to...

Earlier maps had underestimated the distances to other continents and exaggerated the outlines of individual nations. Now global dimensions could be set, with authority, by the celestial spheres. Indeed, King Louis XIV of France, confronted...

In the progressive growth of astronomy, physics or mechanical science was developed, and when this had been, to a certain degree, successfully cultivated, it gave birth to the science of chemistry.

Love is only one fine star away.

In my opinion the separation of the c- and ac-stars is the most important advancement in stellar classification since the trials by Vogel and Secchi … To neglect the c-properties in classifying stellar spectra, I...

I have realized; it is during the times I am far outside my element that I experience myself the most. That I see and feel who I really am, the most! I think that’s what...

The optimization of cosmic darkness and of Earth’s location within the dark universe that sacrifices neither the material needs of human beings nor their capacity to gain knowledge about the universe reflects masterful engineering at...

[Regarding mathematics,] there are now few studies more generally recognized, for good reasons or bad, as profitable and praiseworthy. This may be true; indeed it is probable, since the sensational triumphs of Einstein, that stellar...

Science literacy is being plugged into the forces that power the universe. There is no excuse for thinking that the Sun, which is a million times the size of Earth, orbits Earth.

His laws changed all of physics and astronomy. His laws made it possible to calculate the mass of the sun and planets. The way it’s done is immensely beautiful. If you know the orbital period...

Staring at the blue sky causes insomnia to occur in the human.