The fact that the planets move around the Sun, not in circles but in ellipses, was first demonstrated by
[amp_mcq option1=”Galileo” option2=”Martin Luther” option3=”Johannes Kepler” option4=”Copernicus” correct=”option3″]
This question was previously asked in
UPSC CDS-1 – 2017
– Galileo Galilei provided telescopic observations that supported the heliocentric model but did not discover elliptical orbits.
– Johannes Kepler, using the detailed astronomical data collected by Tycho Brahe, formulated his three laws of planetary motion between 1609 and 1619.
– Kepler’s First Law states that the orbit of a planet is an ellipse with the Sun at one of the two foci.