Time Quote by Carl Sagan

“Kepler’s third or harmonic law states that the squares of the periods of the planets (the times for them to complete one orbit) are…

— Carl Sagan

“ Kepler 's laws, although not rigidly true, are sufficiently near to the truth to have led to the discovery of the law of…

— Isaac Newton

Planets move in ellipses with the Sun at one focus.

— Johannes Kepler

“Kepler and Newton represent a critical transition in human history, the discovery that fairly simple mathematical laws pervade all of Nature; that the same…

— Carl Sagan

“planetary orbit, for example, is described quite simply as the response of a planet to the curvature of space in the vicinity of the…

— Neil deGrasse Tyson

The smaller the planets are, they are, other things being equal, of so much the greater density; for so the powers of gravity on…

— Isaac Newton

That very law which moulds a tear And bids it trickle from its source,- That law preserves the earth a sphere, And guides the…

— Samuel Rogers

“The next question was — what makes planets go around the sun? At the time of Kepler some people answered this problem by saying…

— Richard Feynman

“Magnetism is, of course, not the same as gravity, but Kepler’s fundamental innovation here is nothing short of breathtaking: he proposed that quantitative physical…

— Carl Sagan

The simplicity of the law by which the celestial bodies move, and the relations of their masses and distances, permit analysis to follow their…

— Pierre-Simon Laplace

“Kepler followed Proclus and believed that 'the main goal of Euclid was to build a geometric theory of the so-called Platonic solids.' Kepler was…

— C. Smoryński

The squares of the periodic times are proportional to the cubes of the mean distances from the sun.

— Johannes Kepler