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m&m 1.4

Modern Astronomy

QuestionAnswer
Aristotle Greek philosopher in 300s B.C. Popularized geocentric view
Geocentric view Earth-centered, universe revolves around earth
Pantheism The belief that God and nature are one
Aristarchus Greek astronomer. Proposed that earth orbited around the sun
Ptolmey Expanded geocentric view
Nicolaus Copernicus Proposed heliocentric view
Heliocentric view Sun-centered, our solar system revolves around the sun
Galileo Galilei Built telescope which supported heliocentric view
Johann Kepler Focused on math to prove heliocentric view. Planet path ellipse. Created three laws of planetary motion.
First law of planetary motion Every planet orbits the sun in an ellipse, with the sun as one of the foci of the ellipse and an empty point in the space as the other
Second law of planetary motion As a planet moves closer to the sun, it travels faster; and as it moves farther away, it slows down
Third law of planetary motion The time it takes a planet to complete one orbit is related to the planet's distance from the sun
Astronomical units The distance between the sun and the earth, unit used to measure relative distances between planets
Isaac Newtwon Famous scientist that identified gravity
Gravity A force of attraction that exists between any two objects
Law of universal gravitation The strength of the gravitational force between two objects depends on their masses and the distance between them
Created by: Jer Stephens
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