Astronomy 2021A/B Final: Astronomy 2021A/B Final Exam Cheat Sheet

• School: Western University
• Department: Astronomy
• Course: Astronomy 2021A/B
• Professor: Martin Zinke- Allmang

Document Summary

Greek science to the philosopher thales (what is the universe made of) plato --> aristotle. Model --> an idea that is still central to modern science, sciencetific model is a conceptual. Kepler"s third law: more distant planets orbit the sun at slower average speeds one astronomical unit-->earth"s average distance from the sun (149. 6million/km). The mathematical statement of kepler"s third law allows us to calculate the average orbital speed of each planet. Newton"s law of motion --> used mathematics to prove that kepler"s law are natural consequences of the laws of motion and gravityhallmarks of science modern science seeks explanations for observed phenomena that rely solely on natural causes . The strength of gravity between two objects decreases with the square of the distance between their centers. inverse square law --> doubling the distance between 2 objects weakens the force of gravity by a factor of 2^2 or 4.