prompt: Rewrite this paragraph so that a layman could easily understand it.
  
  Mars was an enigma to ancient astronomers, who were bewildered by its apparently capricious motion across the sky—sometimes in the same direction as the Sun and other celestial objects (direct, or prograde, motion), sometimes in the opposite direction (retrograde motion). In 1609 the German astronomer Johannes Kepler used the superior naked-eye observations of the planet by his Danish colleague Tycho Brahe to empirically deduce its laws of motion and so pave the way for the modern gravitational theory of the solar system. Kepler found that the orbit of Mars was an ellipse along which the planet moved with nonuniform but predictable motion. Earlier astronomers had based their theories on the older Ptolemaic idea of hierarchies of circular orbits and uniform motion.
chosen.role: system
chosen.content: A chat.
chosen.role: user
chosen.content: Rewrite this paragraph so that a layman could easily understand it.
  
  Mars was an enigma to ancient astronomers, who were bewildered by its apparently capricious motion across the sky—sometimes in the same direction as the Sun and other celestial objects (direct, or prograde, motion), sometimes in the opposite direction (retrograde motion). In 1609 the German astronomer Johannes Kepler used the superior naked-eye observations of the planet by his Danish colleague Tycho Brahe to empirically deduce its laws of motion and so pave the way for the modern gravitational theory of the solar system. Kepler found that the orbit of Mars was an ellipse along which the planet moved with nonuniform but predictable motion. Earlier astronomers had based their theories on the older Ptolemaic idea of hierarchies of circular orbits and uniform motion.
chosen.role: assistant
chosen.content: Mars was once a mystery to ancient astronomers. They were puzzled by its unstable movement across the sky. Sometimes, it would move directly - in the same direction as the Sun and other celestial objects. Sometimes, it would move in the opposite direction, called "retrograde". In 1609, the German astronomer Johannes Kepler used the superior naked-eye observations of Mars by his Danish colleague Tycho Brahe to figure out the planet's laws of motion. This paved the way for the modern theory of gravity in our solar system. Kepler found that the orbit of Mars was an ellipse shape. He found that it moved with nonuniform but predictable motion. Before this, astronomers had followed the Ptolemaic idea of hierarchies of circular orbits and uniform motion.
rejected.role: system
rejected.content: A chat.
rejected.role: user
rejected.content: Rewrite this paragraph so that a layman could easily understand it.
  
  Mars was an enigma to ancient astronomers, who were bewildered by its apparently capricious motion across the sky—sometimes in the same direction as the Sun and other celestial objects (direct, or prograde, motion), sometimes in the opposite direction (retrograde motion). In 1609 the German astronomer Johannes Kepler used the superior naked-eye observations of the planet by his Danish colleague Tycho Brahe to empirically deduce its laws of motion and so pave the way for the modern gravitational theory of the solar system. Kepler found that the orbit of Mars was an ellipse along which the planet moved with nonuniform but predictable motion. Earlier astronomers had based their theories on the older Ptolemaic idea of hierarchies of circular orbits and uniform motion.
rejected.role: assistant