He imagines himself drifting through space

Exploring planets, galaxies, and every place.

As h...

Doing the work was what mattered to Isaac Newton. He kept at it before the plague, during, and after his return to college. He wrote that during the plague year, he had been in the prime of his age for invention and minded Mathematics and Philosophy more than at any time since.

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Galileo Galilei, a contemporary of Kepler, built a telescope and began fixing its lens on the planets. He made a series of remarkable discoveries: that the moon was not flat and smooth, there were spots on the sun, Jupiter had moons that orbited it, Venus had phases like the moon, which proved th...