POV-Ray : Newsgroups : povray.off-topic : Fun challenge Server Time
28 Jul 2024 14:30:12 EDT (-0400)
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From: Le Forgeron
Subject: Re: Fun challenge
Date: 26 Aug 2014 16:24:28
Message: <53fcecfc$1@news.povray.org>
On 26/08/2014 21:55, Warp wrote:
> Would it be possible to make a planet orbit a star, and five moons
> orbiting the star with the planet, one in each Lagrangian point?
> Or even the moons orbiting the Lagrangian points themselves (ie.
> seemingly orbiting around nothing.)
> 

Only if the moons have a small enough mass (compared to the two others).
That's the definition of the Lagrange points. Is an asteroid a moon ?


Problem with L1, L2 & L3, they are a saddle: along the orbits, the field
push you back to Lx, but along the star-planet line, the field push you
away from it, so if you get nearer or further, you're doomed.

The asteroids (trojans and greeks) at L4 & L5 of the sun-jupiter system
shows that it's possible to have some swarms moving around the sun at
the rate of the planet.

> http://en.wikipedia.org/wiki/Jupiter_Trojan

You can even dream of horseshoe orbital:

> http://en.wikipedia.org/wiki/Horseshoe_orbit



-- 
IQ of crossposters with FU: 100 / (number of groups)
IQ of crossposters without FU: 100 / (1 + number of groups)
IQ of multiposters: 100 / ( (number of groups) * (number of groups))

-- 
IQ of crossposters with FU: 100 / (number of groups)
IQ of crossposters without FU: 100 / (1 + number of groups)
IQ of multiposters: 100 / ( (number of groups) * (number of groups))


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From: Francois Labreque
Subject: Re: Fun challenge
Date: 26 Aug 2014 21:56:51
Message: <53fd3ae3$1@news.povray.org>

> A) Make a solar system with  binary stars
>

Done.

> B) Make the binary stars orbit around each other so that the trajectory
> looks like intersecting circles of the same size, yet the stars should
> never collide.
>

Done.

> C) Have a planet for each star without colliding.
>

Can't be done.

>
> F) ad a planet that orbits both stars.

Relatively stable system with two planets.  Green's orbit is way too 
wobbly to sustain life, but life on Blue could potentially exist, 
albeit, with Game-Of-Thrones-like seasons that last for years.

http://goo.gl/7D4kG9

 > D) give each planet a moon.

Haven't been successful so far.  Probably because of the limits of the tool.

 >
 > E) change the size of one moon  to be the same size as it's planet so
 > that they become binary planets

Haven't been succesful either.

-- 
/*Francois Labreque*/#local a=x+y;#local b=x+a;#local c=a+b;#macro P(F//
/*    flabreque    */L)polygon{5,F,F+z,L+z,L,F pigment{rgb 9}}#end union
/*        @        */{P(0,a)P(a,b)P(b,c)P(2*a,2*b)P(2*b,b+c)P(b+c,<2,3>)
/*   gmail.com     */}camera{orthographic location<6,1.25,-6>look_at a }


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From: Aydan
Subject: Re: Fun challenge
Date: 27 Aug 2014 06:30:00
Message: <web.53fdb282af6ef2fed0f66c6d0@news.povray.org>
Francois Labreque <fla### [at] videotronca> wrote:
> Relatively stable system with two planets.  Green's orbit is way too
> wobbly to sustain life, but life on Blue could potentially exist,
> albeit, with Game-Of-Thrones-like seasons that last for years.
>
> http://goo.gl/7D4kG9

I made the Suns a little less wobbly and the planetary orbits are a bit more
stable too
http://goo.gl/sQOBip

Regards
Aydan


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From: Aydan
Subject: Re: Fun challenge
Date: 27 Aug 2014 07:50:00
Message: <web.53fdc51eaf6ef2fed0f66c6d0@news.povray.org>
"Aydan" <hes### [at] hendrik-sachsenet> wrote:
> I made the Suns a little less wobbly and the planetary orbits are a bit more
> stable too
> http://goo.gl/sQOBip
>
> Regards
> Aydan

now with moons
http://goo.gl/3gqUT0


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From: Aydan
Subject: Re: Fun challenge
Date: 27 Aug 2014 07:55:01
Message: <web.53fdc6b9af6ef2fed0f66c6d0@news.povray.org>
"Aydan" <hes### [at] hendrik-sachsenet> wrote:
> "Aydan" <hes### [at] hendrik-sachsenet> wrote:
> > I made the Suns a little less wobbly and the planetary orbits are a bit more
> > stable too
> > http://goo.gl/sQOBip
> >
> > Regards
> > Aydan
>
> now with moons
> http://goo.gl/3gqUT0

And now woth binary planets:
http://goo.gl/AvijjE

This is actually a lot of fun

Regards
Aydan


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From: Francois Labreque
Subject: Re: Fun challenge
Date: 27 Aug 2014 09:33:31
Message: <53fdde2b$1@news.povray.org>

> And now woth binary planets:
> http://goo.gl/AvijjE
>
The Green planets collide after 10 minutes or so.

This one, though, appears very stable.

http://goo.gl/etS9Md

> This is actually a lot of fun

Yes.



-- 
/*Francois Labreque*/#local a=x+y;#local b=x+a;#local c=a+b;#macro P(F//
/*    flabreque    */L)polygon{5,F,F+z,L+z,L,F pigment{rgb 9}}#end union
/*        @        */{P(0,a)P(a,b)P(b,c)P(2*a,2*b)P(2*b,b+c)P(b+c,<2,3>)
/*   gmail.com     */}camera{orthographic location<6,1.25,-6>look_at a }


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From: Francois Labreque
Subject: Re: Fun challenge
Date: 27 Aug 2014 09:50:20
Message: <53fde21c$1@news.povray.org>


>> And now woth binary planets:
>> http://goo.gl/AvijjE
>>
> The Green planets collide after 10 minutes or so.
>
> This one, though, appears very stable.
>
> http://goo.gl/etS9Md
>

Now with a 3rd planet.  Unfortunately, with the tool's granularity, I 
can't make it a binary planet. :(

http://goo.gl/o9PiF6

Ok.. . Now I should stop playing with this and do actual work...

-- 
/*Francois Labreque*/#local a=x+y;#local b=x+a;#local c=a+b;#macro P(F//
/*    flabreque    */L)polygon{5,F,F+z,L+z,L,F pigment{rgb 9}}#end union
/*        @        */{P(0,a)P(a,b)P(b,c)P(2*a,2*b)P(2*b,b+c)P(b+c,<2,3>)
/*   gmail.com     */}camera{orthographic location<6,1.25,-6>look_at a }


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From: clipka
Subject: Re: Fun challenge
Date: 27 Aug 2014 11:35:52
Message: <53fdfad8@news.povray.org>
Am 27.08.2014 03:56, schrieb Francois Labreque:

> Relatively stable system with two planets.  Green's orbit is way too
> wobbly to sustain life, but life on Blue could potentially exist,
> albeit, with Game-Of-Thrones-like seasons that last for years.
>
> http://goo.gl/7D4kG9

Difficult to form naturally, with the planets having an opposite 
direction of revolution.


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From: clipka
Subject: Re: Fun challenge
Date: 27 Aug 2014 11:52:26
Message: <53fdfeba$1@news.povray.org>
Am 27.08.2014 17:35, schrieb clipka:
> Am 27.08.2014 03:56, schrieb Francois Labreque:
>
>> Relatively stable system with two planets.  Green's orbit is way too
>> wobbly to sustain life, but life on Blue could potentially exist,
>> albeit, with Game-Of-Thrones-like seasons that last for years.
>>
>> http://goo.gl/7D4kG9
>
> Difficult to form naturally, with the planets having an opposite
> direction of revolution.

Anterograde, with the outer planet pair oscillating between two orbits 
with different excentricity.

(Ultimately colliding with one of the inner planets, sadly.)


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From: Francois Labreque
Subject: Re: Fun challenge
Date: 29 Aug 2014 10:42:08
Message: <54009140$1@news.povray.org>

> Am 27.08.2014 03:56, schrieb Francois Labreque:
>
>> Relatively stable system with two planets.  Green's orbit is way too
>> wobbly to sustain life, but life on Blue could potentially exist,
>> albeit, with Game-Of-Thrones-like seasons that last for years.
>>
>> http://goo.gl/7D4kG9
>
> Difficult to form naturally, with the planets having an opposite
> direction of revolution.
>
What?  You're saying that the accretion disk around a protostar wouldn't 
spontaneously start spinning in the opposite direction? ;)

-- 
/*Francois Labreque*/#local a=x+y;#local b=x+a;#local c=a+b;#macro P(F//
/*    flabreque    */L)polygon{5,F,F+z,L+z,L,F pigment{rgb 9}}#end union
/*        @        */{P(0,a)P(a,b)P(b,c)P(2*a,2*b)P(2*b,b+c)P(b+c,<2,3>)
/*   gmail.com     */}camera{orthographic location<6,1.25,-6>look_at a }


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