Planets move in ellipses with the Sun at one focus.

quote by Johannes Kepler
Added by Lucian Velea
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The radius vector describes equal areas in equal times.

quote by Johannes Kepler
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Truth is the daughter of time, and I feel no shame in being her midwife.

quote by Johannes Kepler
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The squares of the periodic times are to each other as the cubes of the mean distances.

quote by Johannes Kepler
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I demonstrate by means of philosophy that the earth is round, and is inhabited on all sides; that it is insignificantly small, and is borne through the stars.

quote by Johannes Kepler
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The diversity of the phenomena of nature is so great, and the treasures hidden in the heavens so rich, precisely in order that the human mind shall never be lacking in fresh nourishment.

quote by Johannes Kepler
Added by Lucian Velea
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