His322dExam2material TYLER - 10/3 Keplers laws of planetary...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
10/3 Kepler’s laws of planetary motion - Kepler felt if he could get better and more accurate measurements of the planets and motions he felt he could make sense of his vision of the structure of the universe - He sees a close connections with observations and he needs the best one to confirm his theory and prove it to other people - To get the best observations and best measurements from Tycho. o Kepler wanted to gain a closer realationship with Tycho to get access to Tycho’s observations so Kepler moved to Prague and became one of Tycho’s assistants in 1600 o Tycho saw Kepler as an extremely intelligent mathematical astronomer. o Kepler is a Copernican but Tyco is not. o In 1601 Tycho died and the Holy Roman Emperor chose Kepler as his successor, therefore giving Kepler access to all of Tycho’s work o Kepler’s original task was to solve the motion of Mars which has a very difficult motion to figure out. None of the other assistants wanted the job. He was so confident he said he could figure it out in 8 days. It took him 8 years. He published his results in Astronomia Nova (1609). - It was good that Kepler’s job was to find to the motion of Mars because it was the only planet whose motion who could not fit into Tycho’s observations with in the given error. - Kepler identified the Sun as the most important part of the Solar system. o Kepler emphasizes that the center or point of reference for everything is the Sun. o He finds the actual orbits of planets are very close to being circular but are a little bit off and are oval like o He realizes that the planets are not moving in epicycles but are moving in changing speed around some center of orbit. - Kepler has a weird way of publishing results as far as scientific works are usually published o He goes through long elaborate accounts of theories that he has and how he went through all the mathematics and observations but then he will say it was wrong. - Kepler fiddled with his theory for five years but still faced a discrepancy between his observations and Tycho’s observations, whose measurements were less than an eighth of a degree off. o So he finally throws circular orbits and thinks he may be an oval o He notices the coincidence of a few numbers and hits on the idea that the orbit of mars is an ellipse. o He sees on that the planets speed up and slowdown in their orbits. They seem to move a little faster when closer to the sun. From this he creates his “Equal Areas Law” o Mars is the most elliptical of the nearby planets so he was very lucky to start with this planet. Had he started with Venus or Mercury he would have been able to fit their orbits into a circle with in permitted observational error. - Elipitical orbit law
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
o The planets all move in elliptical orbits with the Sun at one Focus - Equal Areas law o Planets speed up and slow down at different parts of an ellipse but will cover the same amount of area when measured from a one of the foci - Not even Galileo seems to have read the Astronomia Nova o Kepler said so much in his work that it often was no read. Going through every
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern