SuzukiSavage.com - Inverse square law and elliptical orbits

eau de sauvage Serious Thumper Offline Posts: 2565 Queensland Gender:	Inverse square law and elliptical orbits 07/22/18 at 03:46:02 Here is a wonderful geometric explanation, if you have ever wondered how is it that the fact that gravity falls off inversely with the square of the distance, inevitably leads to elliptical orbits. https://www.youtube.com/watch?v=xdIjYBtnvZU
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Dave YaBB Moderator ModSquad Offline SuzukiSavage.com Rocks! Posts: 18101 Camp Springs, Kentucky Gender:	Re: Inverse square law and elliptical orbits Reply #1 - 07/22/18 at 17:21:52 OK....I was able to follow along to the 10 minute mark - then I needed a concentration break!
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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28668 Tucson Az Gender:	Re: Inverse square law and elliptical orbits Reply #2 - 07/23/18 at 08:10:02 If Dave only made 10 minutes,.. I'm not even gonna' try...
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IslandRoad Serious Thumper Offline It doesn't vibrate, it purrs! Posts: 1147 The Kiewa Valley, Australia Gender:	Re: Inverse square law and elliptical orbits Reply #3 - 07/23/18 at 19:22:55 That was like watching 'contemporary dance' ... I had only a very little idea of what was going on, but I still enjoyed it!
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Trippah Serious Thumper Offline I ride, therefore I am. Posts: 2517 central Mass Gender:	Re: Inverse square law and elliptical orbits Reply #4 - 07/24/18 at 06:01:28 OMG - my eyes were rolling like those ellipses at 7:58 so I stopped at 8:13. I am always amazed that humans can think in such abstract ways, at time humans can be truly interesting.
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Re: Inverse square law and elliptical orbits
Reply #5 - 07/24/18 at 06:08:59

OMG - my eyes were rolling like those ellipses at 7:58 so I stopped at 8:13. I am always amazed that humans can think in such abstract ways, at time humans can be truly interesting. Shocked

As an aside, I watched a brief tv show on the latest new Hubble-like telescope scheduled to be sent out in a few years. In some ways it is most interesting to me that as the farther away they compute a star to be, it is farther away in distance and, in time (further back in history.)
Its kinda odd, as we always think of what we are seeing as being here and now, which is almost true for our local viewing but apparently not for galactic distances. Roll Eyes

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Eegore Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 8348	Re: Inverse square law and elliptical orbits Reply #6 - 07/24/18 at 06:51:02 Talking with one of my friends that works for Atlas Pacific who builds satellite projects, he doesn't think we are looking back in time when the Hubble and such does those deep images. There's a handful of newer theories out there about how that works but I haven't had time to look into them.
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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28668 Tucson Az Gender:	Re: Inverse square law and elliptical orbits Reply #7 - 07/24/18 at 09:13:48 The thing I never could get,.. is... if you look in any direction, you look back in time, and further you look the further back in time you see... If we all came from a single point,.. how is that point in every direction we look?... Somebody is playing a trick on us...
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Dave

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Re: Inverse square law and elliptical orbits
Reply #8 - 07/24/18 at 09:36:58

Serowbot wrote on 07/24/18 at 09:13:48:

If we all came from a single point,.. how is that point in every direction we look?...

We are not at the center - but the light took so long to get to us over the vast expanse....that any direction you look you see something that is no longer in the place where it was when the light began the journey!

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T And T Garage Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 9839	Re: Inverse square law and elliptical orbits Reply #9 - 07/24/18 at 10:01:05 Very cool video - I love Feynman. Speaking of time/distance, etc. - if you really wanna blow your mind, look into Planck time.
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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28668 Tucson Az Gender:	Re: Inverse square law and elliptical orbits Reply #10 - 07/24/18 at 11:55:16 I Googled "Center of the Universe", just for fun,.. and it told me it's in Tulsa...
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Dave YaBB Moderator ModSquad Offline SuzukiSavage.com Rocks! Posts: 18101 Camp Springs, Kentucky Gender:	Re: Inverse square law and elliptical orbits Reply #11 - 07/24/18 at 13:06:33 I thought the Center of the Universe was closer to me....in Rabbit Hash Kentucky. https://www.youtube.com/watch?v=33CACmJDdbg
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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28668 Tucson Az Gender:	Re: Inverse square law and elliptical orbits Reply #12 - 07/24/18 at 15:15:37
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Dave YaBB Moderator ModSquad Offline SuzukiSavage.com Rocks! Posts: 18101 Camp Springs, Kentucky Gender:	Re: Inverse square law and elliptical orbits Reply #13 - 07/24/18 at 19:24:27 Rabbit Hash is reportedly the only town in the US that has Euthanized a Mayor!
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eau de sauvage

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Re: Inverse square law and elliptical orbits
Reply #14 - 07/24/18 at 23:13:15

Dave wrote on 07/22/18 at 17:21:52:

OK....I was able to follow along to the 10 minute mark - then I needed a concentration break! Huh

Oh don't get me wrong, I've watched it about half a dozen times and I'm only about 3/4 of the way though getting it. However as it avoids any calculus or advance math I know I can do this.

But as @IslandRoad has said it's still very enjoyable.

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