The radius vector describes equal areas in equal times.
Meaning of the quote
The quote you provided describes an important idea in astronomy. It means that as a planet orbits the Sun, the imaginary line connecting the planet to the Sun sweeps out equal areas in equal amounts of time. This helps explain how planets move in their orbits around the Sun. Understanding this concept was a key breakthrough for scientists in learning how our solar system works.
About Johannes Kepler
Johannes Kepler was a renowned German astronomer, mathematician, and natural philosopher who made groundbreaking contributions to the scientific revolution. He is best known for his laws of planetary motion and his influential works on astronomy and optics, which laid the foundations for Isaac Newton’s theory of universal gravitation.
More quotes from Johannes Kepler
Truth is the daughter of time, and I feel no shame in being her midwife.
German mathematician and astronomer (1571-1630)
The radius vector describes equal areas in equal times.
German mathematician and astronomer (1571-1630)
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.
German mathematician and astronomer (1571-1630)
Nature uses as little as possible of anything.
German mathematician and astronomer (1571-1630)
Planets move in ellipses with the Sun at one focus.
German mathematician and astronomer (1571-1630)
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.
German mathematician and astronomer (1571-1630)
The squares of the periodic times are to each other as the cubes of the mean distances.
German mathematician and astronomer (1571-1630)