revolution of modern science

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The Planets

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ASTRONOMY

door ritu johar

revolution of modern science

Newton

demonstrae keplr's laws

theory of universal gravitation

3 laws of motions

Galileo(1564-1642)

discovered Jupiter's moons

sun has dark pitchs(sun spots), sun is not perfect

first one to use telescope to study the heavens systematically

correct understanding of how things move on the surface of the earth

Kepler(1571-1630)

3 laws of plantery Motion

the ration of the squares of the revolution periods for 2 planets is equal to the rationof cubes of their semimajor axes

the line joining the planet with to the sun sweeps out=areas in equal timesas the planet travels around the ellips

the orbits of the planets are ellip, with the sun at one focuse of the ellips

defined ellips in terms of distances

Planets aren't circles but it is flattented circles

Tyco Braha(1546-1601)

measured parallax

stars were so fare to measure their parallax

observations about supernova

observation about Mars helped later

used modern instruments before telescope

Copericn(1473-1543)

explained the existence of empty space(vacum)

explained the brightness of the planets

retrigrade motion can be explained in terms of geometry

aren't always the same distatance from the earth

earth is just a planet

earth is rotated once in24 hours

moon oribits around the earth

sun is the centre of the univers