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Re: All orbits are swiveling ellipses albeit very small is the norm

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On 24/01/2016 4:07 PM, Tom Roberts wrote:
> On 1/23/16 1/23/16   9:01 PM, John Gogo wrote:
>> So, you are basically saying that orbits are mostly, nearly perfectly
>> circular- which is what I have been saying.
>
> And you are wrong. Yes, the eight planets have reasonably circular
> orbits except for Mercury. But most large asteroids and dwarf planets
> like Pluto do not have circular orbits, and there are more of them than
> planets. Moreover, there are over 700 comets that have been observed,
> and NONE of them have an orbit that is anywhere close to circular.
>
> Part of this is selection bias -- to be notable an orbiting object must
> be observed. But if an inner solar system object had an eccentricity
> comparable to a long-period comet (0.97-0.99), it would never have been
> observed by humans because it would have melted or broken up long ago
> (coming so close to the sun). So the only objects in highly elliptical
> orbits are far from the sun and have periods of hundred to thousands of
> years (or longer, c.f. the newly discovered "Planet 9"); Halley's comet
> is a rarity (period only 75 years).
>
>      Mathematically, the set of circular orbits is minuscule
>      within the set of all possible orbits. That is, the vast
>      majority of all possible orbits are not circular at all.
>
> In addition, most extrasolar planets whose eccentricities are known have
> values more than ten times that of earth.
>
>      It's remarkable (and sad) that you have opinions on so many
>      things you clearly know nothing about. You really should
>      learn how to recognize when you don't know something.
>
>
> Tom Roberts

I think James may have been referring to apsidal precession, first 
noticed in the orbit of Mercury. But saying that it applies to all 
orbits is only stating what's already well known.

Sylvia.

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All orbits are swiveling ellipses albeit very small is the norm jamesl51165@gmail.com - 2016-01-23 12:42 -0800
  Re: All orbits are swiveling ellipses albeit very small is the norm John Gogo <jfgogo22@yahoo.com> - 2016-01-23 19:01 -0800
    Re: All orbits are swiveling ellipses albeit very small is the norm John Gogo <jfgogo22@yahoo.com> - 2016-01-23 20:35 -0800
    Re: All orbits are swiveling ellipses albeit very small is the norm Tom Roberts <tjroberts137@sbcglobal.net> - 2016-01-23 23:07 -0600
      Re: All orbits are swiveling ellipses albeit very small is the norm Watto Chewbacca <watchu@wattochewbacca.org> - 2016-01-24 21:12 +0000
        Re: All orbits are swiveling ellipses albeit very small is the norm "Paul B. Andersen" <relativity@paulba.no> - 2016-01-25 20:16 +0100
      Re: All orbits are swiveling ellipses albeit very small is the norm Sylvia Else <sylvia@not.at.this.address> - 2016-01-25 15:18 +1100
        Re: All orbits are swiveling ellipses albeit very small is the norm jamesl51165@gmail.com - 2016-01-25 08:41 -0800
          Re: All orbits are swiveling ellipses albeit very small is the norm Sylvia Else <sylvia@not.at.this.address> - 2016-01-26 10:17 +1100
          Re: All orbits are swiveling ellipses albeit very small is the norm John Gogo <jfgogo22@yahoo.com> - 2016-01-26 14:57 -0800
      Re: All orbits are swiveling ellipses albeit very small is the norm John Gogo <jfgogo22@yahoo.com> - 2016-01-26 14:59 -0800
      Re: All orbits are swiveling ellipses albeit very small is the norm John Gogo <jfgogo22@yahoo.com> - 2016-01-26 15:01 -0800
        Re: All orbits are swiveling ellipses albeit very small is the norm John Gogo <jfgogo22@yahoo.com> - 2016-01-26 17:27 -0800
          Re: All orbits are swiveling ellipses albeit very small is the norm John Gogo <jfgogo22@yahoo.com> - 2016-02-02 19:42 -0800
            Re: All orbits are swiveling ellipses albeit very small is the norm Sylvia Else <sylvia@not.at.this.address> - 2016-02-03 23:41 +1100

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