Kepler's Laws of Planetary Motion

Overview and examples of Kepler's Three Laws of Planetary Motion; Law of Orbits, Law of Areas, and Law of Periods.

Licensed under Creative Commons: By Attribution 3.0

[samarthshah]

I can't believe I watched a 9-year-old video and it actually helped you go straight to the point thank you.

[cherylkrichbaum]

We've watched many videos on the 3 Laws. This one is the best so far to explain Law 3. Thank you!

[terrifctea]

THIS REALLY HELPED! CONTINUE WHAT YOU DO MAN!!!

[chapachuu]

This saved me an hour of reading. Cheers!

[SashaTheVideo]

Thank you!! It just wasn't clicking in class or from reading the textbook but this did it!!

[archimedesmaid]

The ellipse at 1:49 is totally out of whack

If the major axis and foci separation are to be in that ratio, the minor axis needs to be 89% of the length of the major. It is only 56% in your drawing

Or on the other hand, if the ellipse shown is to remain the same shape, the foci need to be MUCH further apart. Fact is the distance between the foci need to be about 83% of the major axis. As of now the distance between foci is only 52% of the MA.

You dont seem to realize that on any ellipse 1 thing is always true: The distance between a foci and the end of the minor axis is always the same as the length of the semimajor axis.

[joelferraro]

Wow this really helped me better understand these principles

[alfredosolari]

Thank you.Very helpful and really clearly explained.

[syedabrar]

Best of the Videos Yet Browsed with best and smooth Explanation

Very clear and well explained! Super helpful!!! Thank you!!

[aadhibala]

Thank you!!! Very helpful explanation!!

[archimedesmaid]

Some trivia: There is no planetary ellipse in our solar system which resembles the ellipses in this vid.

For instance, the planet which has the smallest eccentricity, Venus, has a minor axis which is 99.997% as long as the major axis.

Pluto, which has the greatest eccentricity has a minor axis which is 97% of the major axis

All other planets' ellipses are in between those two

All the planetary ellipses are basically visual circles, even the most eccentric ones.

[karthigamanivannan]

This video was very helpful and clear 👍

[ericpham]

if the earth spin, the moon goes around the earth fill up two foci of the ellipse and the sun goes around the minor axis of the ellipse so the moon is a moving focus the earth is another focus stationary and the sun rotate on the plane dissect the minor axis. i think the model would work better

[NotsewTheGreat]

I wanna like this but it's at 777, so i'ma leave it at that...

[albertbaldry]

Can some one actually update this law with some realism. for this to be considered as fact someone has to actually prove it to be right. Two idiots in the 1500"s have nothing on the fact we have people in space right now. Look at your video, as you move the earth around the sun with no other focus but the sun. One end you are really close to the sun meaning everyone is having Summer at the same time and very far everyone is having winter at the same time. You do see where the problem is right. Plus what is the second Focus, you moved on without saying it.