Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > sci.physics > #510599 > unrolled thread

If the Sun [or a Black Hole] pulls things directly toward it, then why does everything move in circles around it?

Back to article view | Back to sci.physics

Contents

  If the Sun [or a Black Hole] pulls things directly toward it, then why does everything move in circles around it? Sam Wormley <swormley1@gmail.com> - 2015-07-31 20:49 -0500
    Re: If the Sun [or a Black Hole] pulls things directly toward it, then why does everything move in circles around it? Fabian Russell <root@localhost.localdomain> - 2015-08-01 03:22 +0000
      Re: If the Sun [or a Black Hole] pulls things directly toward it, then why does everything move in circles around it? john <johnsefton288@gmail.com> - 2015-07-31 20:56 -0700
        Re: If the Sun [or a Black Hole] pulls things directly toward it, then why does everything move in circles around it? HVAC <Mr.HVAC@gmail.com> - 2015-08-02 06:11 -0400
    Re: If the Sun [or a Black Hole] pulls things directly toward it, then why does everything move in circles around it? "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-08-01 15:07 -0700
      Re: If the Sun [or a Black Hole] pulls things directly toward it, then why does everything move in circles around it? Sam Wormley <swormley1@gmail.com> - 2015-08-01 17:11 -0500
        Re: If the Sun [or a Black Hole] pulls things directly toward it, then why does everything move in circles around it? Sam Wormley <swormley1@gmail.com> - 2015-08-01 20:56 -0500
        Re: If the Sun [or a Black Hole] pulls things directly toward it, then why does everything move in circles around it? Double-A <double-a3@hush.com> - 2015-08-01 17:08 -0700
    Re: If the Sun [or a Black Hole] pulls things directly toward it, then why does everything move in circles around it? "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-08-03 11:49 -0700
      Re: If the Sun [or a Black Hole] pulls things directly toward it, then why does everything move in circles around it? Double-A <double-a3@hush.com> - 2015-08-03 12:00 -0700
        Re: If the Sun [or a Black Hole] pulls things directly toward it, then why does everything move in circles around it? "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-08-03 12:08 -0700
          Re: If the Sun [or a Black Hole] pulls things directly toward it, then why does everything move in circles around it? HVAC <Mr.HVAC@gmail.com> - 2015-08-04 06:20 -0400
    Re: If the Sun [or a Black Hole] pulls things directly toward it, then why does everything move in circles around it? "Y.Porat" <y.y.porat@gmail.com> - 2015-08-03 20:18 -0700
      Re: If the Sun [or a Black Hole] pulls things directly toward it, then why does everything move in circles around it? "Buck Futter" <invalid@example.com> - 2015-08-05 22:32 -0700
    Re: If the Sun [or a Black Hole] pulls things directly toward it, then why does everything move in circles around it? Nicolaas Vroom <nicolaas.vroom@pandora.be> - 2015-08-04 05:42 -0700
    Re: If the Sun [or a Black Hole] pulls things directly toward it, then why does everything move in circles around it? "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-08-04 12:48 -0700
      Re: If the Sun [or a Black Hole] pulls things directly toward it, then why does everything move in circles around it? Double-A <double-a3@hush.com> - 2015-08-04 13:45 -0700
    Re: If the Sun [or a Black Hole] pulls things directly toward it, then why does everything move in circles around it? "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-08-04 13:05 -0700
      Re: If the Sun [or a Black Hole] pulls things directly toward it, then why does everything move in circles around it? Sam Wormley <swormley1@gmail.com> - 2015-08-04 16:13 -0500

#510599 — If the Sun [or a Black Hole] pulls things directly toward it, then why does everything move in circles around it?

If the Sun [or a Black Hole] pulls things directly toward it, then why 
does everything move in circles around it?
> http://www.askamathematician.com/2014/10/q-if-the-sun-pulls-things-directly-toward-it-then-why-does-everything-move-in-circles-around-it/

> So that’s how a planet can accelerate toward the Sun forever without
> getting any closer.  The sideways motion of planets is due to the
> fact that if a planet were not moving sideways, it would find itself
> in the Sun in short order.  In fact, the Sun is nothing more than a
> massive collection of all the matter from the formation of the solar
> system that wasn’t moving sideways fast enough (which is nearly all
> of it).
>
> Why things end up in circular orbits is a more subtle question.  The
> quickest explanation is that things in not-circular orbits run into
> trouble until either their orbit is sufficiently round or they’re
> destroyed.  It’s not that circular orbits are somehow better, it’s
> just that other orbits carry more risk of serious impacts or
> gravitational interactions (e.g., with Jupiter) that may lead to
> short, unfortunate orbits.
>
> Assuming that an orbit is stable, then it will be an ellipse (there’s
> a post here on exactly why, but it’s a whole thing.).  A circle is
> the simplest kind of ellipse, but ellipses can be extremely stretched
> out.  For example, comets have very elliptical orbits (like Sedna in
> the picture below).  In these orbits the comet is mostly moving
> toward and away from the Sun, so for them the Sun’s pull mostly
> changes their speed and changes their direction less.




-- 

sci.physics is an unmoderated newsgroup dedicated
to the discussion of physics, news from the physics
community, and physics-related social issues.

[toc] | [next] | [standalone]

#510607

On Fri, 31 Jul 2015 20:49:45 -0500, Sam Wormley wrote:

> If the Sun [or a Black Hole] pulls things directly toward it, then why 
> does everything move in circles around it?
>

Why does a suppository go up your ass instead of circling around it?

This stuff isn't even fit for a "special" education elementary school
(a.k.a. retard day care center).

If you insist on copy/paste then copy/paste from *professional* journals
only.

[toc] | [prev] | [next] | [standalone]

#510609

A galactic center looks more like the
center of a whirlpool.
The IMF goes around one way only.
Why doesn't anything orbit the other
way?

[toc] | [prev] | [next] | [standalone]

#510821

On 8/1/2015 4:23 PM, Double-A wrote:
>
> Or maybe Descartes' swirling aethers force the one way movement.  Einstein was very respectful of Descartes.


There is no ether


-- 
Cut off one head, two more shall take its place.
HAIL HYDRA!
https://www.youtube.com/watch?v=FZcG5UOY224

[toc] | [prev] | [next] | [standalone]

#510700

On Friday, July 31, 2015 at 6:49:43 PM UTC-7, Sam Wormley wrote:
> If the Sun [or a Black Hole] pulls things directly toward it, then why 
> does everything move in circles around it?
> > http://www.askamathematician.com/2014/10/q-if-the-sun-pulls-things-directly-toward-it-then-why-does-everything-move-in-circles-around-it/
> 
> > So that's how a planet can accelerate toward the Sun forever without
> > getting any closer.  The sideways motion of planets is due to the
> > fact that if a planet were not moving sideways, it would find itself
> > in the Sun in short order.  In fact, the Sun is nothing more than a
> > massive collection of all the matter from the formation of the solar
> > system that wasn't moving sideways fast enough (which is nearly all
> > of it).
> >
> > Why things end up in circular orbits is a more subtle question.  The
> > quickest explanation is that things in not-circular orbits run into
> > trouble until either their orbit is sufficiently round or they're
> > destroyed.  It's not that circular orbits are somehow better, it's
> > just that other orbits carry more risk of serious impacts or
> > gravitational interactions (e.g., with Jupiter) that may lead to
> > short, unfortunate orbits.
> >
> > Assuming that an orbit is stable, then it will be an ellipse (there's
> > a post here on exactly why, but it's a whole thing.).  A circle is
> > the simplest kind of ellipse, but ellipses can be extremely stretched
> > out.  For example, comets have very elliptical orbits (like Sedna in
> > the picture below).  In these orbits the comet is mostly moving
> > toward and away from the Sun, so for them the Sun's pull mostly
> > changes their speed and changes their direction less.
> 
> 
> 
> 
> -- 
> 
> sci.physics is an unmoderated newsgroup dedicated
> to the discussion of physics, news from the physics
> community, and physics-related social issues.

When as a kid I use to think of falling but side stepping and missing the sun. It works. Its easy to picture.It should be taught as a way of orbiting.TreBert

[toc] | [prev] | [next] | [standalone]

#510702

On 8/1/15 5:07 PM, reber g=emc^2 wrote:
> On Friday, July 31, 2015 at 6:49:43 PM UTC-7, Sam Wormley wrote:
>> If the Sun [or a Black Hole] pulls things directly toward it, then why
>> does everything move in circles around it?
>>> http://www.askamathematician.com/2014/10/q-if-the-sun-pulls-things-directly-toward-it-then-why-does-everything-move-in-circles-around-it/
>>
>>> So that's how a planet can accelerate toward the Sun forever without
>>> getting any closer.  The sideways motion of planets is due to the
>>> fact that if a planet were not moving sideways, it would find itself
>>> in the Sun in short order.  In fact, the Sun is nothing more than a
>>> massive collection of all the matter from the formation of the solar
>>> system that wasn't moving sideways fast enough (which is nearly all
>>> of it).
>>>
>>> Why things end up in circular orbits is a more subtle question.  The
>>> quickest explanation is that things in not-circular orbits run into
>>> trouble until either their orbit is sufficiently round or they're
>>> destroyed.  It's not that circular orbits are somehow better, it's
>>> just that other orbits carry more risk of serious impacts or
>>> gravitational interactions (e.g., with Jupiter) that may lead to
>>> short, unfortunate orbits.
>>>
>>> Assuming that an orbit is stable, then it will be an ellipse (there's
>>> a post here on exactly why, but it's a whole thing.).  A circle is
>>> the simplest kind of ellipse, but ellipses can be extremely stretched
>>> out.  For example, comets have very elliptical orbits (like Sedna in
>>> the picture below).  In these orbits the comet is mostly moving
>>> toward and away from the Sun, so for them the Sun's pull mostly
>>> changes their speed and changes their direction less.
>>
>>
>>
>>
>> --
>>
>> sci.physics is an unmoderated newsgroup dedicated
>> to the discussion of physics, news from the physics
>> community, and physics-related social issues.
>
> When as a kid I use to think of falling but side stepping and missing the sun. It works. Its easy to picture.It should be taught as a way of orbiting.TreBert
>

   It was taught by Johannes Kepler about 400 years ago. It is known
   as Kepler's 1st Law. Planets are forever falling around the Sun in
   elliptical orbits.



-- 

sci.physics is an unmoderated newsgroup dedicated
to the discussion of physics, news from the physics
community, and physics-related social issues.

[toc] | [prev] | [next] | [standalone]

#510721

On 8/1/15 7:08 PM, Double-A wrote:
> On Saturday, August 1, 2015 at 3:11:12 PM UTC-7, Sam Wormley wrote:
>> On 8/1/15 5:07 PM, reber g=emc^2 wrote:
>>> On Friday, July 31, 2015 at 6:49:43 PM UTC-7, Sam Wormley wrote:
>>>> If the Sun [or a Black Hole] pulls things directly toward it, then why
>>>> does everything move in circles around it?
>>>>> http://www.askamathematician.com/2014/10/q-if-the-sun-pulls-things-directly-toward-it-then-why-does-everything-move-in-circles-around-it/
>>>>
>>>>> So that's how a planet can accelerate toward the Sun forever without
>>>>> getting any closer.  The sideways motion of planets is due to the
>>>>> fact that if a planet were not moving sideways, it would find itself
>>>>> in the Sun in short order.  In fact, the Sun is nothing more than a
>>>>> massive collection of all the matter from the formation of the solar
>>>>> system that wasn't moving sideways fast enough (which is nearly all
>>>>> of it).
>>>>>
>>>>> Why things end up in circular orbits is a more subtle question.  The
>>>>> quickest explanation is that things in not-circular orbits run into
>>>>> trouble until either their orbit is sufficiently round or they're
>>>>> destroyed.  It's not that circular orbits are somehow better, it's
>>>>> just that other orbits carry more risk of serious impacts or
>>>>> gravitational interactions (e.g., with Jupiter) that may lead to
>>>>> short, unfortunate orbits.
>>>>>
>>>>> Assuming that an orbit is stable, then it will be an ellipse (there's
>>>>> a post here on exactly why, but it's a whole thing.).  A circle is
>>>>> the simplest kind of ellipse, but ellipses can be extremely stretched
>>>>> out.  For example, comets have very elliptical orbits (like Sedna in
>>>>> the picture below).  In these orbits the comet is mostly moving
>>>>> toward and away from the Sun, so for them the Sun's pull mostly
>>>>> changes their speed and changes their direction less.
>>>>
>>>>
>>>>
>>>>
>>>> --
>>>>
>>>> sci.physics is an unmoderated newsgroup dedicated
>>>> to the discussion of physics, news from the physics
>>>> community, and physics-related social issues.
>>>
>>> When as a kid I use to think of falling but side stepping and missing the sun. It works. Its easy to picture.It should be taught as a way of orbiting.TreBert
>>>
>>
>>     It was taught by Johannes Kepler about 400 years ago. It is known
>>     as Kepler's 1st Law. Planets are forever falling around the Sun in
>>     elliptical orbits.
>
>
> So, maybe Bert as a kid was reading Kepler.
>
> Double-A
>


   That... would be nice, indeed!


-- 

sci.physics is an unmoderated newsgroup dedicated
to the discussion of physics, news from the physics
community, and physics-related social issues.

[toc] | [prev] | [next] | [standalone]

#510851

On Saturday, August 1, 2015 at 3:11:12 PM UTC-7, Sam Wormley wrote:
> On 8/1/15 5:07 PM, reber g=emc^2 wrote:
> > On Friday, July 31, 2015 at 6:49:43 PM UTC-7, Sam Wormley wrote:
> >> If the Sun [or a Black Hole] pulls things directly toward it, then why
> >> does everything move in circles around it?
> >>> http://www.askamathematician.com/2014/10/q-if-the-sun-pulls-things-directly-toward-it-then-why-does-everything-move-in-circles-around-it/
> >>
> >>> So that's how a planet can accelerate toward the Sun forever without
> >>> getting any closer.  The sideways motion of planets is due to the
> >>> fact that if a planet were not moving sideways, it would find itself
> >>> in the Sun in short order.  In fact, the Sun is nothing more than a
> >>> massive collection of all the matter from the formation of the solar
> >>> system that wasn't moving sideways fast enough (which is nearly all
> >>> of it).
> >>>
> >>> Why things end up in circular orbits is a more subtle question.  The
> >>> quickest explanation is that things in not-circular orbits run into
> >>> trouble until either their orbit is sufficiently round or they're
> >>> destroyed.  It's not that circular orbits are somehow better, it's
> >>> just that other orbits carry more risk of serious impacts or
> >>> gravitational interactions (e.g., with Jupiter) that may lead to
> >>> short, unfortunate orbits.
> >>>
> >>> Assuming that an orbit is stable, then it will be an ellipse (there's
> >>> a post here on exactly why, but it's a whole thing.).  A circle is
> >>> the simplest kind of ellipse, but ellipses can be extremely stretched
> >>> out.  For example, comets have very elliptical orbits (like Sedna in
> >>> the picture below).  In these orbits the comet is mostly moving
> >>> toward and away from the Sun, so for them the Sun's pull mostly
> >>> changes their speed and changes their direction less.
> >>
> >>
> >>
> >>
> >> --
> >>
> >> sci.physics is an unmoderated newsgroup dedicated
> >> to the discussion of physics, news from the physics
> >> community, and physics-related social issues.
> >
> > When as a kid I use to think of falling but side stepping and missing the sun. It works. Its easy to picture.It should be taught as a way of orbiting.TreBert
> >
> 
>    It was taught by Johannes Kepler about 400 years ago. It is known
>    as Kepler's 1st Law. Planets are forever falling around the Sun in
>    elliptical orbits.


So, maybe Bert as a kid was reading Kepler.

Double-A

[toc] | [prev] | [next] | [standalone]

#511028

On Friday, July 31, 2015 at 6:49:43 PM UTC-7, Sam Wormley wrote:
> If the Sun [or a Black Hole] pulls things directly toward it, then why 
> does everything move in circles around it?
> > http://www.askamathematician.com/2014/10/q-if-the-sun-pulls-things-directly-toward-it-then-why-does-everything-move-in-circles-around-it/
> 
> > So that's how a planet can accelerate toward the Sun forever without
> > getting any closer.  The sideways motion of planets is due to the
> > fact that if a planet were not moving sideways, it would find itself
> > in the Sun in short order.  In fact, the Sun is nothing more than a
> > massive collection of all the matter from the formation of the solar
> > system that wasn't moving sideways fast enough (which is nearly all
> > of it).
> >
> > Why things end up in circular orbits is a more subtle question.  The
> > quickest explanation is that things in not-circular orbits run into
> > trouble until either their orbit is sufficiently round or they're
> > destroyed.  It's not that circular orbits are somehow better, it's
> > just that other orbits carry more risk of serious impacts or
> > gravitational interactions (e.g., with Jupiter) that may lead to
> > short, unfortunate orbits.
> >
> > Assuming that an orbit is stable, then it will be an ellipse (there's
> > a post here on exactly why, but it's a whole thing.).  A circle is
> > the simplest kind of ellipse, but ellipses can be extremely stretched
> > out.  For example, comets have very elliptical orbits (like Sedna in
> > the picture below).  In these orbits the comet is mostly moving
> > toward and away from the Sun, so for them the Sun's pull mostly
> > changes their speed and changes their direction less.
> 
> 
> 
> 
> -- 
> 
> sci.physics is an unmoderated newsgroup dedicated
> to the discussion of physics, news from the physics
> community, and physics-related social issues.

AA as a kid I sat in the corner with science books in back of me at the Boston library.I read all the imperial thinkers had to say.I agreed with most,but even as a kid I had my own thoughts. Here in this group I hope people find me interesting? Sam finds me ???  I seemed to lost most of my internet friends. In reality all my real friends have passed away before hitting 80.I drink to much as 4 doctors told me. They are died and I'm alive at 87,and a half.Go figure  TreBert

[toc] | [prev] | [next] | [standalone]

#511032

On Monday, August 3, 2015 at 11:49:32 AM UTC-7, reber g=emc^2 wrote:
> On Friday, July 31, 2015 at 6:49:43 PM UTC-7, Sam Wormley wrote:
> > If the Sun [or a Black Hole] pulls things directly toward it, then why 
> > does everything move in circles around it?
> > > http://www.askamathematician.com/2014/10/q-if-the-sun-pulls-things-directly-toward-it-then-why-does-everything-move-in-circles-around-it/
> > 
> > > So that's how a planet can accelerate toward the Sun forever without
> > > getting any closer.  The sideways motion of planets is due to the
> > > fact that if a planet were not moving sideways, it would find itself
> > > in the Sun in short order.  In fact, the Sun is nothing more than a
> > > massive collection of all the matter from the formation of the solar
> > > system that wasn't moving sideways fast enough (which is nearly all
> > > of it).
> > >
> > > Why things end up in circular orbits is a more subtle question.  The
> > > quickest explanation is that things in not-circular orbits run into
> > > trouble until either their orbit is sufficiently round or they're
> > > destroyed.  It's not that circular orbits are somehow better, it's
> > > just that other orbits carry more risk of serious impacts or
> > > gravitational interactions (e.g., with Jupiter) that may lead to
> > > short, unfortunate orbits.
> > >
> > > Assuming that an orbit is stable, then it will be an ellipse (there's
> > > a post here on exactly why, but it's a whole thing.).  A circle is
> > > the simplest kind of ellipse, but ellipses can be extremely stretched
> > > out.  For example, comets have very elliptical orbits (like Sedna in
> > > the picture below).  In these orbits the comet is mostly moving
> > > toward and away from the Sun, so for them the Sun's pull mostly
> > > changes their speed and changes their direction less.
> > 
> > 
> > 
> > 
> > -- 
> > 
> > sci.physics is an unmoderated newsgroup dedicated
> > to the discussion of physics, news from the physics
> > community, and physics-related social issues.
> 
> AA as a kid I sat in the corner with science books in back of me at the Boston library.I read all the imperial thinkers had to say.I agreed with most,but even as a kid I had my own thoughts. Here in this group I hope people find me interesting? Sam finds me ???  I seemed to lost most of my internet friends. In reality all my real friends have passed away before hitting 80.I drink to much as 4 doctors told me. They are died and I'm alive at 87,and a half.Go figure  TreBert


My grandfather drank plenty of beer, and tried not to work too hard.  He made it to 97!.

Double-A

[toc] | [prev] | [next] | [standalone]

#511035

On Monday, August 3, 2015 at 12:00:23 PM UTC-7, Double-A wrote:
> On Monday, August 3, 2015 at 11:49:32 AM UTC-7, reber g=emc^2 wrote:
> > On Friday, July 31, 2015 at 6:49:43 PM UTC-7, Sam Wormley wrote:
> > > If the Sun [or a Black Hole] pulls things directly toward it, then why 
> > > does everything move in circles around it?
> > > > http://www.askamathematician.com/2014/10/q-if-the-sun-pulls-things-directly-toward-it-then-why-does-everything-move-in-circles-around-it/
> > > 
> > > > So that's how a planet can accelerate toward the Sun forever without
> > > > getting any closer.  The sideways motion of planets is due to the
> > > > fact that if a planet were not moving sideways, it would find itself
> > > > in the Sun in short order.  In fact, the Sun is nothing more than a
> > > > massive collection of all the matter from the formation of the solar
> > > > system that wasn't moving sideways fast enough (which is nearly all
> > > > of it).
> > > >
> > > > Why things end up in circular orbits is a more subtle question.  The
> > > > quickest explanation is that things in not-circular orbits run into
> > > > trouble until either their orbit is sufficiently round or they're
> > > > destroyed.  It's not that circular orbits are somehow better, it's
> > > > just that other orbits carry more risk of serious impacts or
> > > > gravitational interactions (e.g., with Jupiter) that may lead to
> > > > short, unfortunate orbits.
> > > >
> > > > Assuming that an orbit is stable, then it will be an ellipse (there's
> > > > a post here on exactly why, but it's a whole thing.).  A circle is
> > > > the simplest kind of ellipse, but ellipses can be extremely stretched
> > > > out.  For example, comets have very elliptical orbits (like Sedna in
> > > > the picture below).  In these orbits the comet is mostly moving
> > > > toward and away from the Sun, so for them the Sun's pull mostly
> > > > changes their speed and changes their direction less.
> > > 
> > > 
> > > 
> > > 
> > > -- 
> > > 
> > > sci.physics is an unmoderated newsgroup dedicated
> > > to the discussion of physics, news from the physics
> > > community, and physics-related social issues.
> > 
> > AA as a kid I sat in the corner with science books in back of me at the Boston library.I read all the imperial thinkers had to say.I agreed with most,but even as a kid I had my own thoughts. Here in this group I hope people find me interesting? Sam finds me ???  I seemed to lost most of my internet friends. In reality all my real friends have passed away before hitting 80.I drink to much as 4 doctors told me. They are died and I'm alive at 87,and a half.Go figure  TreBert
> 
> 
> My grandfather drank plenty of beer, and tried not to work too hard.  He made it to 97!.
> 
> Double-A

AA My grandfather lived to be 105.He drank rum after 6pm.He came from London to America.He had 16 children,and two wives. Tanta was his second wife and she was a bellie dancer.He met her when he was in the Bore War in Africa. My grandfather life would make a great movie.  Bert

[toc] | [prev] | [next] | [standalone]

#511138

On 8/3/2015 3:08 PM, reber g=emc^2 wrote:
>
> AA My grandfather lived to be 105.He drank rum after 6pm


I didn't know that Noah drank rum.



-- 
Cut off one head, two more shall take its place.
HAIL HYDRA!
https://www.youtube.com/watch?v=FZcG5UOY224

[toc] | [prev] | [next] | [standalone]

#511099

On Saturday, August 1, 2015 at 4:49:43 AM UTC+3, Sam Wormley wrote:
> If the Sun [or a Black Hole] pulls things directly toward it, then why 
> does everything move in circles around it?
> > http://www.askamathematician.com/2014/10/q-if-the-sun-pulls-things-directly-toward-it-then-why-does-everything-move-in-circles-around-it/
> 
> > So that's how a planet can accelerate toward the Sun forever without
> > getting any closer.  The sideways motion of planets is due to the
> > fact that if a planet were not moving sideways, it would find itself
> > in the Sun in short order.  In fact, the Sun is nothing more than a
> > massive collection of all the matter from the formation of the solar
> > system that wasn't moving sideways fast enough (which is nearly all
> > of it).
> >
> > Why things end up in circular orbits is a more subtle question.  The
> > quickest explanation is that things in not-circular orbits run into
> > trouble until either their orbit is sufficiently round or they're
> > destroyed.  It's not that circular orbits are somehow better, it's
> > just that other orbits carry more risk of serious impacts or
> > gravitational interactions (e.g., with Jupiter) that may lead to
> > short, unfortunate orbits.
> >
> > Assuming that an orbit is stable, then it will be an ellipse (there's
> > a post here on exactly why, but it's a whole thing.).  A circle is
> > the simplest kind of ellipse, but ellipses can be extremely stretched
> > out.  For example, comets have very elliptical orbits (like Sedna in
> > the picture below).  In these orbits the comet is mostly moving
> > toward and away from the Sun, so for them the Sun's pull mostly
> > changes their speed and changes their direction less.
> 
> 
> 
> 
> -- 
> 
> sci.physics is an unmoderated newsgroup dedicated
> to the discussion of physics, news from the physics
> community, and physics-related social issues.

================================
see the Y Circlon mechanism !!!

Y.Porat
=================================

[toc] | [prev] | [next] | [standalone]

#511520

> ================================
> see the Y Circlon mechanism !!!
>
> Y.Porat
> =================================

1) What?

2) Where?

3) Who?

4) How?

5) Whore?

[toc] | [prev] | [next] | [standalone]

#511148

Op zaterdag 1 augustus 2015 03:49:43 UTC+2 schreef Sam Wormley:
> If the Sun [or a Black Hole] pulls things directly toward it, then why 
> does everything move in circles around it?
> > http://www.askamathematician.com/2014/10/q-if-the-sun-pulls-things-directly-toward-it-then-why-does-everything-move-in-circles-around-it/
> 
> > So that's how a planet can accelerate toward the Sun forever without
> > getting any closer. etc 

> > Why things end up in circular orbits is a more subtle question. etc 

> > Assuming that an orbit is stable, etc 

Why do you ask this question and why do you at the same time
also post the answer ?

Is there something wrong with the answer ?
If yes please show us the details.

(May be the same reasoning applies to all your postings)

Nicolaas Vroom

[toc] | [prev] | [next] | [standalone]

#511216

On Friday, July 31, 2015 at 6:49:43 PM UTC-7, Sam Wormley wrote:
> If the Sun [or a Black Hole] pulls things directly toward it, then why 
> does everything move in circles around it?
> > http://www.askamathematician.com/2014/10/q-if-the-sun-pulls-things-directly-toward-it-then-why-does-everything-move-in-circles-around-it/
> 
> > So that's how a planet can accelerate toward the Sun forever without
> > getting any closer.  The sideways motion of planets is due to the
> > fact that if a planet were not moving sideways, it would find itself
> > in the Sun in short order.  In fact, the Sun is nothing more than a
> > massive collection of all the matter from the formation of the solar
> > system that wasn't moving sideways fast enough (which is nearly all
> > of it).
> >
> > Why things end up in circular orbits is a more subtle question.  The
> > quickest explanation is that things in not-circular orbits run into
> > trouble until either their orbit is sufficiently round or they're
> > destroyed.  It's not that circular orbits are somehow better, it's
> > just that other orbits carry more risk of serious impacts or
> > gravitational interactions (e.g., with Jupiter) that may lead to
> > short, unfortunate orbits.
> >
> > Assuming that an orbit is stable, then it will be an ellipse (there's
> > a post here on exactly why, but it's a whole thing.).  A circle is
> > the simplest kind of ellipse, but ellipses can be extremely stretched
> > out.  For example, comets have very elliptical orbits (like Sedna in
> > the picture below).  In these orbits the comet is mostly moving
> > toward and away from the Sun, so for them the Sun's pull mostly
> > changes their speed and changes their direction less.
> 
> 
> 
> 
> -- 
> 
> sci.physics is an unmoderated newsgroup dedicated
> to the discussion of physics, news from the physics
> community, and physics-related social issues.

There can be no circular orbits as there can not be perfect circles.If there was only one object in the universe it would in time be a perfect circle,but who would care. TreBert

[toc] | [prev] | [next] | [standalone]

#511227

On Tuesday, August 4, 2015 at 12:48:40 PM UTC-7, reber g=emc^2 wrote:
> On Friday, July 31, 2015 at 6:49:43 PM UTC-7, Sam Wormley wrote:
> > If the Sun [or a Black Hole] pulls things directly toward it, then why 
> > does everything move in circles around it?
> > > http://www.askamathematician.com/2014/10/q-if-the-sun-pulls-things-directly-toward-it-then-why-does-everything-move-in-circles-around-it/
> > 
> > > So that's how a planet can accelerate toward the Sun forever without
> > > getting any closer.  The sideways motion of planets is due to the
> > > fact that if a planet were not moving sideways, it would find itself
> > > in the Sun in short order.  In fact, the Sun is nothing more than a
> > > massive collection of all the matter from the formation of the solar
> > > system that wasn't moving sideways fast enough (which is nearly all
> > > of it).
> > >
> > > Why things end up in circular orbits is a more subtle question.  The
> > > quickest explanation is that things in not-circular orbits run into
> > > trouble until either their orbit is sufficiently round or they're
> > > destroyed.  It's not that circular orbits are somehow better, it's
> > > just that other orbits carry more risk of serious impacts or
> > > gravitational interactions (e.g., with Jupiter) that may lead to
> > > short, unfortunate orbits.
> > >
> > > Assuming that an orbit is stable, then it will be an ellipse (there's
> > > a post here on exactly why, but it's a whole thing.).  A circle is
> > > the simplest kind of ellipse, but ellipses can be extremely stretched
> > > out.  For example, comets have very elliptical orbits (like Sedna in
> > > the picture below).  In these orbits the comet is mostly moving
> > > toward and away from the Sun, so for them the Sun's pull mostly
> > > changes their speed and changes their direction less.
> > 
> > 
> > 
> > 
> > -- 
> > 
> > sci.physics is an unmoderated newsgroup dedicated
> > to the discussion of physics, news from the physics
> > community, and physics-related social issues.
> 
> There can be no circular orbits as there can not be perfect circles.If there was only one object in the universe it would in time be a perfect circle,but who would care. TreBert


Yes, imagining circular orbits is very archaic thinking.  Like Aristotle!

Double-A

[toc] | [prev] | [next] | [standalone]

#511223

On Friday, July 31, 2015 at 6:49:43 PM UTC-7, Sam Wormley wrote:
> If the Sun [or a Black Hole] pulls things directly toward it, then why 
> does everything move in circles around it?
> > http://www.askamathematician.com/2014/10/q-if-the-sun-pulls-things-directly-toward-it-then-why-does-everything-move-in-circles-around-it/
> 
> > So that's how a planet can accelerate toward the Sun forever without
> > getting any closer.  The sideways motion of planets is due to the
> > fact that if a planet were not moving sideways, it would find itself
> > in the Sun in short order.  In fact, the Sun is nothing more than a
> > massive collection of all the matter from the formation of the solar
> > system that wasn't moving sideways fast enough (which is nearly all
> > of it).
> >
> > Why things end up in circular orbits is a more subtle question.  The
> > quickest explanation is that things in not-circular orbits run into
> > trouble until either their orbit is sufficiently round or they're
> > destroyed.  It's not that circular orbits are somehow better, it's
> > just that other orbits carry more risk of serious impacts or
> > gravitational interactions (e.g., with Jupiter) that may lead to
> > short, unfortunate orbits.
> >
> > Assuming that an orbit is stable, then it will be an ellipse (there's
> > a post here on exactly why, but it's a whole thing.).  A circle is
> > the simplest kind of ellipse, but ellipses can be extremely stretched
> > out.  For example, comets have very elliptical orbits (like Sedna in
> > the picture below).  In these orbits the comet is mostly moving
> > toward and away from the Sun, so for them the Sun's pull mostly
> > changes their speed and changes their direction less.
> 
> 
> 
> 
> -- 
> 
> sci.physics is an unmoderated newsgroup dedicated
> to the discussion of physics, news from the physics
> community, and physics-related social issues.

Stuff that sun pulls in comes in with a cure 99.999 of the time.Once stuff hits the sun's surface it goes to the core in a stright line relative to the core. Trebert

[toc] | [prev] | [next] | [standalone]

#511233

On 8/4/15 3:05 PM, reber g=emc^2 wrote:
> Once stuff hits the sun's surface it goes to the core in a stright line relative to the core. Trebert

   No it doesn't -- it's too hot for anything to hold together sans
   degenerate matter and black holes.

-- 

sci.physics is an unmoderated newsgroup dedicated
to the discussion of physics, news from the physics
community, and physics-related social issues.

[toc] | [prev] | [standalone]

Back to top | Article view | sci.physics

csiph-web