Astronomers Study Guide

physic

Erosthenes

determined circumference of earth real early

Aristotle

presented a geocentric model, placing Earth at the center of the universe.

Aristarchus

was one of the first to propose a heliocentric model, suggesting that the Sun is at the center of the universe and that Earth orbits around it.

Ptolemy

developed the geocentric model of the universe, elaborating on Aristotle's ideas and introducing the concept of epicycles to explain the motion of planets.

Copernicus

revolutionized the understanding of the universe by advocating for a heliocentric model, which placed the Sun at the center and suggested that Earth and other planets revolve around it.

Tycho Brahe

a fucking madman who pushed the geo-heliocentric model, but also found positions of the planets

Kepler

found out orbits are elliptical and heliocentric

Galileo

designed the telescope, phases of venus, sunspots

newton’s

universal gravitation, elliptical paths of planets and laws of motion.

Halley

predicted comet return and calculated its orbit

Einstein’s contribution to astronomy

theory of general relativity, explained the bending of light by gravity and predicted black holes.

Hubble

discovered the expanding universe, formulated Hubble's Law relating distance to redshift.