answers: Nicolaus Copernicus
context: Kepler's laws of planetary motion In astronomy, Kepler's laws of planetary motion are three scientific laws describing the motion of planets around the Sun. Most planetary orbits are nearly circular, and careful observation and calculation are required in order to establish that they are not perfectly circular. Calculations of the orbit of Mars, whose published values are somewhat suspect, indicated an elliptical orbit. From this, Johannes Kepler inferred that other bodies in the Solar System, including those farther away from the Sun, also have elliptical orbits. Kepler's work (published between 1609 and 1619) improved the heliocentric theory of Nicolaus Copernicus, </s> Johann Elert Bode Johann Elert Bode (; 19 January 1747 – 23 November 1826) was a German astronomer known for his reformulation and popularisation of the Titius–Bode law. Bode determined the orbit of Uranus and suggested the planet's name. Bode was born in Hamburg. As a youth, he suffered from a serious eye disease which particularly damaged his right eye; he continued to have trouble with his eyes throughout his life. His early promise in mathematics brought him to the attention of Johann Georg Büsch, who allowed Bode to use his own library for study. He began his career with </s> be pinpoint against a single point on the retina and how images were conveyed upside down. Galileo built a telescope in 1609 and sent Kepler his account of the skies in Siderius Nunicus. Kepler responded to Galileo with three treatises. In return of the treatises, Galileo wrote to Kepler saying, “I thank you because you were the first one, and practically the only one, to have complete faith in my assertions.” Kepler’s Laws of Planetary Motion When Kepler started working with Tycho Brahe around 1600, Tycho gave him the task to review all the information he had on Mars. Kepler
question: who discovered that the planets orbit the sun