Kepler's Third Law of Motion - Law of Periods (Astronomy)

[@pranavgupta9354]

these are the best series of videos I have come across on Kepler's laws. ... thank you so much..

[@1979badiola]

You are speaking the truth

[@project77977]

Ya you are right I never seen this type of explanation

[@AlexandeRSciswoR]

Same

[@nathanielkang667]

amen

[@sanatansah5085]

Oh Indian

[@noahlackey3571]

I love the music playing when it shows the galaxy.

[@alphalunamare]

So Kepler, sitting at his desk weighed the whole planet! Let alone that shiny thing ...Awesome Dude! :-)

[@amomynousdasit7142]

God bless this lady!!!! The one video I understood! All hail Socratica! Thank you. Sincerely, someone freaking out about her GCSE astronomy exam

[@Socratica]

Hang in there! We're rooting for you!! 💜🦉

[@amomynousdasit7142]

@@Socratica I am telling u, u r a saint

[@nomarcyesports9298]

@@Socratica uuu

[@NotsewTheGreat]

"Can't....Work... Properly...." Famous last words of my brain 2020 Sep.

[@hollylash2197]

gotta study for that astronomy test thooo ahhhh

[@internetuser2845]

third law is confusing for me but it was nice video😃😞😞

[@heisaidmisuchiang2307]

Me 2

[@SanjayKumar-ko6kq]

hey♥️♥️

[@expl1citken582]

Ironically its easier than the 2nd one

[@mikethespike056]

Just p^2 = a^3

[@musaritrashid1977]

Watch again

[@CD1254]

I am studying for a midterm and this has helped a lot. Thanks a lot for the help! I still don't understand the 3rd law as great as a should, but I think this video gave me what I needed.

[@Socratica]

We're so glad you found our video helpful!! We hope your midterm goes well. What class is it for?

[@sulbhasurve1188]

12th

[@krkmjr8429]

@@Socratica for me 11-finals

[@julesmoore7114]

omg thank you so much I have an astronomy test tomorrow, and I needed a breakdown of Kepler's third law

[@Socratica]

We're so glad we could help! Good luck on your test!! :)

[@samielhellhound]

You guys are killin' it, great video. This one's going straight to favorites. :)

[@Socratica]

+Brutal Brewer Thanks so much!! Always great to hear from you, we really appreciate it!!

[@pointerish]

I loved you ecclesiastical latin pronunciation for Harmonices mundi. :)

[@FranFerioli]

Great video as usual. As Feynman explained, to weight the earth (and everything else) you need to estimate the gravitational constant first. This had to be done with an experiment in the lab. This is advertisement for the Feynman lectures that are one of the very few videos on youtube that are even better than Socratica (if you can imagine such a thing).

[@alfredosolari7597]

Most interesting.Very clearly explained. The teacher's enthusiasm for her subject certainly helps.

[@mattorr2256]

I could listen to her vast knowledge of the cosmos all day, every single day.

[@LetsReadPodcast]

My brian hurts .( ̵˃﹏˂̵ )

[@smit_1449]

And i see why it does

[@noahmnm8119]

no one replied till 2 years later

[@bettasplendens713]

Hope Brian feels better

[@Fozzie-qd5ol]

@@bettasplendens713 hahaha. funny.

[@sshum00]

Is it weird that I listen to these videos to sleep? They're so soothing.

[@Socratica]

+2501 If you keep this up you'll earn a degree in your sleep! :)

[@mundirmohammed7500]

+Socratica 😂

[@Nickeman]

im also doing it lol

[@nomi98]

Maybe it's just your mind shutting itself off because it doesn't want to study. XD

[@ashishpanwar9304]

Chup baith jai pagal

[@nicolasurrutiaburgos7290]

such a beautiful law, thanks for the video!

[@illbet4589]

I love this Channel’s videos! I learn more here than from boring lectures.

[@Dad_tales]

Your explanations were so clear. Please keep it up

[@shauryachaturvedi7174]

Thank u mam the best explanation for this topic I have seen we hope to see more from u mam and in addition u have a great voice mam

[@shahedm.3718]

Kepler’s 3rd law is basically explaining how to figure out the orbital period of a comet and it’s distance to the sun, 3:27 and using an equation we can find out the mass of a planet by figuring the distance and orbital period of another planet!

[@boofang10]

WONDERFULLY presented !! How significant Kepler's Third Law leads to finding the masses of celestial objects !! 🌌🪐🌏🌕

[@Socratica]

Thank you for your kind encouraging comments! We're so glad you enjoyed this set of videos-we loved making them!!

[@bhavikkalita8627]

You guys do a great job i love learning things from Socratica

[@misswatson8464]

you have helped me a lot to understand kepler's laws. thanks a lot..

[@freejackprepper1739]

Your videos are truly amazing as I stated once before. My nephew is currently learning of Kepler's Laws, so I have directed him to your videos and channel. :) The narrator/personality is terrific :)

[@Socratica]

+Freejack Prepper That's wonderful to hear, thank you so much! Good luck to your nephew! :)

[@Dobetterlivebetter]

the editing is mind blowing

[@shusrushadicholkar7217]

Thank you !!! Socratica ....ur videos are the one which I understood..... I was searching for such videos only for my exam study for the 10 th std......very cordial and wonderfully designed....explained and animated videos 📹

[@kamsochukwuejikeme510]

Best kepler's law video ever!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[@elliediprima610]

Thank goodness for these videos

[@isaiahyanez5806]

An amazing presentation it was extremely informative. : )

[@hasininissanka1287]

Very good explanation on Kepler's 3rd law...it's really helpful....got some new Idea about it...thank you again and again...hope these types of valuable explanations in future🙏

[@sulfo4229]

Exactly what I needed, fantastically explained! Thank you.

[@mustafa_dash3555]

Oh really !😇😇😇😇 Thank you with all my heart💓💓💓💓 ... I have always been looking for a simple explanation🧐🧐🧐🧐 of all the three laws of Kepler and here you have helped me to understand those laws and to understand the proofs of the full laws ... Thanks again❣️💓💖👍👍👍

[@owlgriffin3781]

Thank you so much! This video was so clear and easy to follow, and was the easiest to understand.

[@_Amit13]

great animation as well as explanations. love from INDIA

[@denied2423]

Kepler's period law says: (r1/r2)^3=(P1/P2)^2. replacing P=2*pi*r/Vp, we have r*Vp^2=Variable. Not constant, because Vp=Ct and (r=variable).And ,due to Vp=Ct,the celestial motion is [r=-4*t^2+4*t*T-4*T^2/6].This is not an ellipse,but a parabolic vortex spiral.Also discovered by Newton,but preferred to say that the orbits are elliptical.See PRINCIPIA page 290,translation of Andre Motte.

[@JVSi_EDCS]

Nice video, excellently explained

[@kareembrooks178]

You just confirmed that math is simple if you follow the formulas. but in all honesty I had trouble keeping up with apply the right numbers to the variables.

[@rusabbaig6851]

Great Explanation of each law . Thank you Socratica

[@5eurosenelsuelo]

This is ffff great! I just missed how to derive it for elliptical orbits. It looked like magic when you changed the radius for the semi major axis

[@russellteejaymolina6736]

Yeah that was a little bit confusing, did she mean that the earth was orbiting the sun in an elliptical but the sun is exactly at the middle, right on the spot where the major axis and minor axis crossed and not located at one of the foci. Kind weird derivation but it still resulted in the right equation?

[@elieshilema739]

The simple language used to explain the laws is excellent for learners

[@narasimhadripilla8088]

The bgm took the video another level... ❤️❤️

[@seshus.v.6956]

Simple and precise explanation

[@live4Cha]

enlightenment of human brain absolutely amazing!

[@mattorr2256]

Yes Indeed.

[@creationforall8522]

Thanks a lot for your efforts 🤓

[@lakhanshahi3637]

Great information video. Thanks

[@akihiko35677]

wow thx a lot it was amazing

[@Dobetterlivebetter]

under rated channel why?

[@ameerhamza4816]

This is the best video about Kepler law

[@Gytax0]

How big is your team, Socratica? Who is behind the KZbin channel? The presenters must have learned a lot of great stuff preparing these videos.

[@shreeharidongare9982]

Hey ,I am from India but I use to watch your video's . You teaches very best.

[@jyotichaudhary7440]

Thanks mam ,it'really very useful for me.

[@govi77777]

Very beautifully explained!!!

[@vedantsinha7374]

i like the animation and the effort that has been put into this video.

[@Socratica]

☆。★。☆。★ ANNOUNCING - SOCRATICA ASTRONOMY REBOOT! We're writing, filming, & editing new videos now. Add your name to our stellar email list so we can notify you when they go live: snu.socratica.com/astronomy ☆。★。☆。★

[@bidisha_roy]

I'm in year 10 (Aus) and didn' have a clue what the law meant before this. Thankyou!!!

[@gargigupta472]

I loved the video!! Best explanation and visuals

[@rayxr]

Correct me if I'm wrong, but I thought Kepler's 3rd Law of Planetary Motion says the P^2 = "C"a^3; not P^2=a^3. He knew there was some constant "C" that needed to be multiplied, but that wasn't discovered until Newton's Law of Universal Gravitation.

[@khwaabkhayaalachchhehain7595]

Best xplanation ever seen Not good not better it was the BEST

[@Monya17.30]

Thank you ❤

[@manw3bttcks]

One complaint here, the solar system diagram at 1:00 shows the planets moving in the opposite speed to radius relationship they really have. The diagram shows Mercury moving very slowly and the outer planets moving very fast. It should be the other way around, planets move with v ~ 1/(r)^1/2 so the inner planets move faster

[@Roberto-REME]

You're great. Thank you for the great knowledge your very inspired way of relating the information.

[@BensLab]

Weighing planets! I feel like such a caveman! Really polished video guys!

[@HARU.7243]

Kepler is a genius to discover all this even before we had such great tech....

[@RayWalker-pythonic]

Fantastic explanation.

[@aneeqalabeeb7013]

amazing explantation... 😍😍

[@Socratica]

Thank you for your kind comment - and thank you for watching!! :)

[@kunslipper]

Thank you so much.

[@vimalramachandran]

Brilliant!

[@actualt]

Hello, :)) I really appreciate how these channel is very educative + subscribed and also what's the intro's music?

[@Socratica]

We're so glad you've found our channel! For the music for our videos, we usually go directly to the artists and pay them for their work - so for the most part you won't hear these pieces elsewhere, unless we are using Classical music. We thought this music captured that feeling you get when you think about the enormous Cosmos! Thanks for watching!

[@robertinventor]

Nicely presented :). But the animation at 1 minute 20 seconds in the book is incorrect - all the planets shown orbiting with the same orbital period.

[@PrateekJain-pi9jc]

can you do geosynchronous and geostationary orbits. Your channel has some of the best explanations ( better than even khan academy in some ways) and satellite orbits are very poorly explained almost everywhere on the internet.

[@Socratica]

This is a great idea! We are making more videos all the time, so we love to hear what you are interested in. Thank you for watching! :)

[@rubenmartinez2994]

Excellent!!

[@thegoodlydragon7452]

Great video. I must wonder, if you don't mind me asking-- how do you support yourself with such a low view count? I'm just curious because this channel strikes me as having a high production cost.

[@Socratica]

+The Goodly Dragon Thanks for watching - we're glad to see you coming back and seeing more of our videos! It's true, we are dedicated to making high quality educational videos, and that means quite a lot of expense. The videos will very gradually pay for themselves, but it might take years. So far, we are self-funded, but we hope to attract patrons. Our KZbin channel is set up to accept donations, so if you know any wealthy philanthropists please send them our way! On our main channel page, on the right there's a button that says "Support this channel." Subtle! :) All the best from Socratica.

[@thegoodlydragon7452]

Socratica Well your videos are excellent. Thanks. :)

[@filipve73]

Does Kepler’s 3rd Law only applies for planetary motion? Can same law by used on a molecular or even atomic level? Let assume you could make an abstract comparison between the Solar System and the 5 States of Matter? (example: H²O) 1) Surface Sun: (Center of Solar System) = Plasma (5000 Kelvin) 2) Venus: (Inner HZ boundary) gas phase -> liquid phase (condensation) 3) Earth: (HZ) liquid phase (radius = 1AU) 4) Mars: (outer HZ boundary) liquid phase -> solid phase (freezing) 5) Pluto: (Solar System Boundary) BEC phase (~0 Kelvin) (just a idea ...)

[@matend8125]

That was super cool

[@madhubalayadav4380]

Thanks

[@candiceford88]

I need to watch this about 10 more times, then I'll have it down. Lol

[@dhruvkumar2718]

It's really helpful

[@wavvy5574]

okay, so I think I finally understand

[@udomatthiasdrums5322]

love it!!

[@simanchalmohanty332]

thanks

[@mohamedumair9806]

Sister excellent

[@rajatmeena7341]

What an explanation

[@SatishPandu-tk2qr]

I always wonder how these scientists calculated mass of earth and mass of sun and other planets... Now this Kepler third law showed it... And your explanation is also very clear... Thank you...

[@hassankamal]

thank you from egypt =D

[@Socratica]

+Hassan Kamal Hello Egypt! Wonderful to hear from you! Thank you so much for watching! :)

[@hassankamal]

Im not just watching Im shared this video and keplir veido in my group of foculty of engineering and every body like your videos very much ...and I'm sorry beacuse my bad accent 😊...we pleased you if you make more video taking about propertis of matter and heat beacouse we take it in our foculty 😀+Socratica

[@Socratica]

Hassan Kamal That is so nice of you to say! (And your English is excellent. :) Definitely more videos on the way. Hello to everyone in your Engineering department!

[@imaginaryvenus5]

I'm from Egypt too, looks like your videos are easily searchable here. And I swear to god you explained it infinite times better than our lecturer. I don't think the lecturer even understood it herself. Don't know where people get their PhD's from nowadays.

[@600237002]

very good.

[@juliogallardo6712]

I don't understand how you generalize an elliptical orbit from a circular one, I mean, you said v(for an elliptical orbit)=(2·π.a)/P, which is not. Could you explain, please?

[@itsAuffy]

so to sum up the first part if we want to find out how long it takes Saturn to make a full rotation then we do Psaturn^2 = (au)^3 --> square it and that = how many earth years relative to saturn's orbit?

[@antypasandreas8435]

Very educational. As a 14 year old, took me a while to understand tho. Great video. :)

[@Socratica]

+Antypas Andreas That's awesome that you took the initiative to learn about Kepler's Laws at 14! You're our favourite person. :) Thanks for watching!

[@antypasandreas8435]

Socratica haha, I doubt that, but it was my pleasure. :) I have a separate physics class a couple times during the week, and recently, I got into a game called kerbal space program, and wanted to get really good at it, and seeing as NASA partially helped design the game mechanics, I thought if I learned how it worked in real life, I would be good at the game its self. So using previously learnt equations, mostly mechanics, and with the help of the internet, I learned all about how space travel works. I recently wanted to increase fuel efficiency, so I learnt how to do gravity assists, and I needed Kepler's 3-rd law to calculate how long it would take for a certain planet to get to where I want it to, how long the orbit is and how much I would need to lower the orbit of my space craft to rendezvous with another planet AFTER escaping Kerbin's (equivalent of earth) sphere of influence. I hope you dont mind me telling you all this, my family never understands what I am saying, and none of my friends really even know how an orbit works.

[@Socratica]

We love to hear what you're interested in - thanks for sharing! We've heard good things about the Kerbal space program - Elon Musk is a fan! :) www.nbcnews.com/science/space/coming-soon-spacexs-elon-musk-how-move-mars-n280311

[@antypasandreas8435]

Socratica I know SpaceX, I follow its missions sometimes. I believe space travel has been abandoned by the government, and its people like Elon Musk with companies like spaceX who are the future of exploration, on top of this, they are funded by the rich 1% who want a joyride into space and not ALL the american tax payers, thus, we have the right people paying for it. :)

[@togetherwithncert5180]

Good video

[@urquizagabe]

Okay, I have a doubt. And it is an involved one. Around 4:15 when you start talking about the "legit" Kepler's 3rd law of motion there is a step in which you start with circles and then calculates the perimeter of a circle as 2*pi*r, which is fine, and then you say that v = 2*pi*r/P. But then you go back to ellipses by just changing the radius of the circle "r" with the length of the semi-major axis "a" to yield v=2*pi*a/P and then keep going as if nothing happened. But v = 2*pi*r/P only works in circles because the perimeter of a circle is 2*pi*r and the speed in a circle must be constant to respect the 2nd law. However, if the speed is not kept constant, as in elliptical orbits, then "r" must be a function of time, but the length of the semi-major axis of the elliptical orbit is always equal to the distance between the perihelion and the aphelion and even if it changes over time slightly, it must change in a time scale orders of magnitude above the scale in which planetary motion takes place, which means that for the purposes of computing orbits it remains constant throughout the orbital period, so it definitely isn't a function of time, meaning that using v = 2*pi*a/P for ellipses yields a constant speed that contradicts the 2nd Law. In order to have that work we would need the perimeter of an ellipse to be expressed in terms of the distance from one of the foci to the circumference, which is a pretty difficult thing to do. So I'm guessing that Kepler's 3rd Law isn't much of a law, but more like a suggestion on how to do things with low-eccentricity orbits? How does Kepler's 3rd and 2nd Law of motion do not contradict each other when applied simultaneously to elliptical orbits?

[@teachermichaelmaalim6103]

Good point Gabriel Urquiza. The first time I came across Kepler's 3rd Law (23 years ago in secondary school), it was expressed in relation to an ellipse terms of segments of the perimeter and the average radius of the sector (segment). It was expressed in terms of the time it takes the orbiting body to sweep one sector (section) rather than the whole ellipse. I think the circular case and semi-major case (ellipse) are just an extension of the t^2 and r^3 case for the sectors.

[@saimounikavase2509]

Thanks madam

[@Socratica]

Welcome to Socratica! We make beautiful educational videos to help you learn MORE. We encourage you to visit our website for extra goodies: www.socratica.com Special hello to teachers and students during the covid pandemic. Hang in there! 💜🦉 PS Teachers, please do not film yourself playing this video and then upload that to KZbin. That's a copyright violation. We encourage you to SHARE our video with your students using the SHARE link. Bonus - that keeps us in business so we can keep making videos for you. Thank you.

[@MoustafaMezher]

on 3:05 you mentioned that instead of (Msun) alone we should use (Msun + M planet) and this is wrong, this constant was found by Newton later on and the Mass of planet will be divided from both end and we will end up with this constant.. so please double check your information..

[@Socratica]

The formula at 3:05 is the correct & general form. Kepler's version is an approximation which works quite well since the mass of the sun is so much greater than the mass of the individual planets. You can read more about the general form from this chapter on Celestial Mechanics on the MIT website: web.mit.edu/8.01t/www/materials/modules/chapter25.pdf

[@owenmartin3307]

Best science video, what do you use for the animation

[@bigbangideas386]

Probably After Effects Or Blender Or Adobe Animator

[@jaminiranjandas206]

Amazing

[@Osamailyas]

nice :) it helped

[@Pooja-iz5fk]

Miss your explanation is very attractive . Keep it up ☺️☺️☺️☺️☺️☺️

[@akhileshkumarpandey581]

It is a very useful viedio

[@williambarnett6163]

Why are the orbits of the planets shown as clockwise and counter-clockwise rotations? A bit confusing.

[@Primogênito_V]

Ótimo vídeo, sua didática é maravilhosa. Peço que fação a versão em português, ajuda muito compreender o material. Desde já agradeço!