In October, 1865, occurred what was, in my eyes, the greatest event in the history of the observatory. The new transit circle arrived from Berlin in its boxes.

One hardly knows where, in the history of science, to look for an important movement that had its effective start in so pure and simple an accident as that which led to the building of the great Washington telescope, and went on to the discovery of the satellites of Mars.

I don't ever balk at being considered a Motown person, because Motown is the greatest musical event that ever happened in the history of music.

The history of man is the history of crimes, and history can repeat. So information is a defence. Through this we can build, we must build, a defence against repetition.

The history of liberty is a history of resistance.

The history of astronomy is a history of receding horizons.