Kepler's Three Laws Explained
Kepler's Three Law's were groundbreaking in that they accurately described the motion of the planets around the sun. They dispelled the idea that the orbits were not circular but elliptical.
However, it was not until Newton that we understood why Kepler's Laws work.
Kepler's work was not in a vacuum however, and was the culmination of hundreds of years of studying the stars - from Aristotle's and Ptolemy's geocentric model to Copernicus' geocentric model and the meticulous measurement of the planets by Tycho Brahe
This video provided an introduction to the scientific history and then proceeds to discuss Kepler's three laws
CHECK OUT THE LESSON ON KEPLER'S LAWS - WITH LOTS OF RESOURCES - www.physicshigh.com/kepler.html
A brief index if you wish to jump straight to the laws
0:00 start
0:43 Ptolemy
2:27 Copernicus
3:55 Tycho Brahe and Kepler
5:38 Kepler's 1st Law
7:15 Kepler's 2nd Law
9:15 Kepler's 3rd Law
12:13 Isaac Newton's explanation
15:25 an example
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Пікірлер: 289
i think my brain just melted out through my ears - I can't fathom how you guys' brains just work like this. I have a huge respect towards all scientists but especially the ones dealing with mathematics . It truly is a talent you have to be born with, to see numbers in such a complex way and understand immediately. It takes me a long time to GET IT. Thank you for this video, it did help a lot!!
@algotraderoptionnfutures4885
Жыл бұрын
Imagine those times no schools, libraries, printing presses etc.. All these discoveries were interdependent.. how they had access to each others discoveries..who documented it?
@zrATT_
10 ай бұрын
@algotraderoptionnfutures4885 maybe they used WhatsApp back then
@kwiky5643
2 ай бұрын
Trust me they are all extremely intelligent, more than me or you, but they work a lot too to become that good. There’s no miracle in science
@kwiky5643
2 ай бұрын
@@algotraderoptionnfutures4885most sent letters to each other
When you went through 5 lectures and 3 discussions and still have no clue what the three laws are exactly, and a KZread video can explain it clearly in less than 20 minutes. You really start questioning our country's education system...
@PhysicsHigh
3 жыл бұрын
Im glad I was able to hep you
@shig8888
2 жыл бұрын
I keep hearing different versions of this, the reason why you find KZread videos simpler is most likely because you're simply paying more attention or because you have the ability to pause a video. If you have actually gone through 5 lectures and still didn't understand it, you might just be a dumbass.
@-TheInfamousOne-
Жыл бұрын
The difference is people used to go and seek a great teacher, now children are provided one by the state that teachs a 3yo-3000yo curriculum.
@Matteop113wo
Жыл бұрын
same boat here this video saved so much time and was great to watch
@matthewfang440
Жыл бұрын
@@PhysicsHigh help* why can't you spell
It took me all night to understand the 3rd Law. Thanks for relating Newton and Kepler's Concepts
@cleyowki
Жыл бұрын
We will be reporting abt the 3rd law and now I'm starting to get scared just by seeing ur comment (knowing that I'm bad at physics) lmao
@gudeliop
10 ай бұрын
same @@cleyowki
5:37 is when he starts talking about the three laws. You're welcome!
@kedarhaldankar1316
3 жыл бұрын
Thanks X
@Heiressesoftheking
3 жыл бұрын
@@kedarhaldankar1316 You're welcome!
@samb9049
3 жыл бұрын
t.y.
@marczoorob7042
3 жыл бұрын
Saved my life
@guuguu7559
3 жыл бұрын
My love
This is soo cool! I love the interactive way of learning. Thank you thank you! I have watched so many videos and only this one has really made sense to me.
very good explanation.
Wow, excellent video!
Well done!
thx for the video
Thank you so much, keep up the good work dude ❤
@PhysicsHigh
8 ай бұрын
Thanks
thank you this helped a lot
Awesome!!!
This was the video I was looking for.
🔥🔥this is amazingggg🥺🥺
very well done compliments
@dianecolville4149
3 жыл бұрын
Love your profile pic 😂
Nice explanation
Excellent
Man that was really cool!
Beautiful presentation ! Thank you.
Well done
Thank you for helping me study how to play ksp
Thank you so much! I had to study Johannes Kepler for a school project and all other videos and websites were really confusing. You did such a good job explaining and simplifying Kepler's three laws. I would love to hear more from you!
@PhysicsHigh
4 жыл бұрын
Thanks. I have lots of videos on various topics and more to come.
this helped me a lot with my science essay, it helped me more clearly understand the three laws
@lebohangthwala6347
5 жыл бұрын
It really was short and brief.
@untitiled1092
4 жыл бұрын
Me too Also subscribe to my channel
@Ion_thruster
3 жыл бұрын
@@untitiled1092 No I will definitly not
really i am so grateful for you thanks !!!
7:34 ah thats why slingshot maneuvers are in closest approach possible
Thank you ❤
Thank you so much sir.
Yes it really helped .. thank you ...
Thank you
Nice video
thanks sir,i really enjoyed the video
@PhysicsHigh
4 жыл бұрын
Glad to hear that
Thankksss
thanks sir.
Great Job
@whirledpeas3477
Жыл бұрын
Blow?
Thank you so much....
So accessible this video content……. we should preserve this
Great explanation
@PhysicsHigh
4 жыл бұрын
Glad you liked it
Good video
Wonderfully explained, Sir.
I love your video.
Thanks a lot, it's very helpful.
time stamp for Laws Of Planetary Motion: 7:03
@sunithavinod1658
4 жыл бұрын
Thanks mate!
@untitiled1092
4 жыл бұрын
I know right? Why did he do such a long intro
@lucanwolfrl8044
3 жыл бұрын
@@untitiled1092 well, I needed it sooo i can say that it's fine since you don't know who'll be watching this video. Some might find history useful and for some might not.
thank homie this helped with my assignment
@PhysicsHigh
3 жыл бұрын
Glad it helped
Wow...I didn't know that Uranus has a period of 30,589 days...that is such a long time for it's neighbors to put up with I think.
Great video. I really enjoyed learning it. Thanks
Very helpful. Thanks.
Thank you for this, it helped allot with multiple research papers. Keep it up!
this is better thnk you man
good explanation skill
@astechpan3324
6 жыл бұрын
boonwalak pathomwongsakul love you dear
Good day, Sir may I know what application did you use in this video? It would mean a lot if you respond. Thank you!
@PhysicsHigh
3 жыл бұрын
You’ll find all that info on my website.
absolute legend. thanks a bunch mate
Very well explained
excellent
@PhysicsHigh
3 жыл бұрын
Thanks
Dang, such an amazing video. Explained everything very well
Thank you sir it was really helpful
Most clear explanation!
Beautifully & delightfully explained. Thanks so much!!
Very nicely explained
awesome! I refer to this video often in my college astronomy class.
I am so glad that I am enrolled in a college physics course that will only ever be of use to me in Kerbal Space Program
Thank you. Very interesting.
Would you allow me to mirror this on my channel? I'm looking for some solid basic science instruction for my viewers.
A gem of a channel !
@PhysicsHigh
2 жыл бұрын
Thanks for that.
very good explanation skill
very impressive method of instruction
Skipped over some of the explanation of the formulas in 3rd law proofing. If you are going to explain it, please do it completely, step by step, without holes. Thanks.
this helped me so much with school thank you so much
Great explanations. You are much better than my classroom teacher. But I suppose Kepler's law of period r^3/t^2=GM/4^2 would only work when the object revolving around a central mass in a circular motion. However, from the video, the eccentricity of mercury is 0.206, which should be large enough for its motion to be considered as elliptical. So my question is can you actually derive a equation that describe such an elliptical motion.
@PhysicsHigh
7 жыл бұрын
Kepler's third law is actually based on the semi major axis (aka r is the length of the semi major axis) so it applies to mercury was well
@yuandadong5177
7 жыл бұрын
To derive what R^3/T^2 equal to, you applied v= 2pi/r which is a formula for circle, and you applied the formula for uniform circular motion F= mv^2/r. Well, then the left hand side of Kepler's third law is for an ellipse, but the right hand side is derived using properties of circles. At least to me, it should not work with ellipse.
Good video. I am the first viewer, from India.
@krishoberoi
4 жыл бұрын
@@pedrovillalobos1995 WHAT??
How this r for every planet came from bcz the path is eliptical so r is not constant. So how it came from?
Fact: over a 15-year period (of 5495 days) Mars returns facing a given star in this curious sequence of time intervals: 707 + 707 + 707 +707 + 707 +707+ 707 + 546 days. As expounded and illustrated in Chapter 5 of my new TYCHOS book (2nd Edition / Dec 2023), this means that the geoheliocentric model devised by Tycho Brahe is the only possible configuration of our Solar System. This, because the 'odd behavior' of Mars - what with its "short Empiric Sidereal Interval" of only 546 days is - perfectly accounted for in Brahe's model. It is now high time to realize this undeniable fact - and to expose Kepler's fraudulent ways in his vain quest to validate heliocentrism (as already discovered and denounced by Prof. W.H. Donahue - the American translator of Kepler's "Astronomia Nova" - back in 1988).
If Apoapsis-Periapsis = 0, then Eccentricity = 0.
What's fascinating about Kepler is that his belief in a God that created a perfect and ordered universe is what spurred him on to create a more accurate model for revolutions. The math is quite something!
Thank you for your beautiful explanations. How is it that Kepler was correct in his calculations despite his belief 18:39 that the earth is the centre of the planetary system when the sun is. Ramzi
How does Kepler’s third law apply to elliptical orbits if it was derived from equations of uniform circular motion?
@PhysicsHigh
2 жыл бұрын
Actually Kleplers‘s law is derived on ellipses where “r” is the semi major axis. A circle is simply and an ellipse where the semimajor axis and the semi minor axis are the same size.
When can I use R for radius and r for radius, or can it be used whenever I want?
@PhysicsHigh
2 ай бұрын
We usually use a lowercase ‘r’.
Blesssssssssss
@untitiled1092
4 жыл бұрын
How stupid do have to be.... EVERYONE knows that god is not real
Does the elliptic orbit nature here corroborates the fact that the earth is not exactly spherical as it appears ??
ver amaizing
Question: What software do you use to produce these videos?
@PhysicsHigh
3 жыл бұрын
I use Inspire from Promethian
I am unable to understand keplers 3rd law Dont know why??? Its very tuffffffff😥
Hi it nice video I have question for you What is ellipse ? in first law of Keplers
It's really educating. thanks to you 🙏🙏
how do you do powerpoint presenataions like that? the one that allows the earth move
On Keplers third law with the radius, how do you measure radius of an ellipse since it's constantly changing? Do you take the average radius across a single revolution or does it not matter and can you just take the radius at any point in the ellipse?
@randoshmuckarias1296
2 жыл бұрын
I believe its indeed the average
@friendlyneighbourhoodai
2 жыл бұрын
It's the mean/average distance from the Sun i.e. radius.
how dose it go the same speed if it is far away didn't he just say it was slower when its far away by the way I am talking about the 1st law
@craffte
6 жыл бұрын
Of course nobody answers...
@PhysicsHigh
6 жыл бұрын
Not sure what you are asking. A object in an elliptical orbit will have a variable speed, faster when it’s closer. Kepler describes this but could explain it. It took Newton to explain with Gravitation
how did kepler's laws of planetary motion change some of the ideas in the ptolemaic and copernican theories?
@PhysicsHigh
4 жыл бұрын
This needs a longer response but in essence Ptolemaic model was geocentric the others heliocentric. Copernican model was circular where as Kepler demonstrated it was elliptical.
@albusdooley8252
4 жыл бұрын
@@PhysicsHigh Thank you very much, now I got my answer for my homework💕
buddy thank you for this amazing video but you are wrong. K=T^2/R^3 and not the reciprocal
@planetclownfishbrain7052
4 жыл бұрын
This is just misdirection to prevent you from discovering the simulation sequence.Hint: Look for the subtle glitches.
is that the explaination why the sun always goes big and small all the time?
What software and hardware do you use to make your videos?
@PhysicsHigh
4 жыл бұрын
See my website under FAQ where I go through the equipment I use.
Respect for Ptolemy
This is highly helpful. Such an explantion in 20 min. Thank you very much sir for such an outstanding explantion
start at 6:00
Very well explained, BUT it would have given me more knowlege with no sacrifice to you if you had moved the earth in ONLY the correct direction but not back and forth! every little bit from you adds to my knowledge.
Magnificently said indeed.
@PhysicsHigh
4 жыл бұрын
thankyou
Thanks. Couldn't understand anything about Kepler's Third Law since all other videos just made things overly complicated, and now I do.
When and how did the idea of "squaring" become so important in math?
@PhysicsHigh
Жыл бұрын
Look up Emilie Du Châtelet
my brain hurts from watching this.
13:45 Why is the velocity taken for a circular motion while it isn't circular but elliptical ?
@PhysicsHigh
5 жыл бұрын
True, but the case of high school circle a good approximation.
This is awesome it has helped me a lot with my AP work thanks PhysicsHigh. Keep on the good work
@PhysicsHigh
2 жыл бұрын
Thanks. Glad it’s helped you in AP.