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28 Mar 2024 09:00:24 EDT (-0400)
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From: Stephen
Subject: Re: Solar System
Date: 1 Jun 2017 09:53:24
Message: <59301c54$1@news.povray.org>
On 5/31/2017 8:15 PM, Bald Eagle wrote:
> Stephen <mca### [at] aolcom> wrote:
>
>> I knew there were a lot but seeing a visualisation puts it in
>> perspective. I wonder if there is an available data set of all the space
>> junk whizzing around the Earth?
>
> The first actual database I was able to dig up:
>
> http://www.ucsusa.org/nuclear-weapons/space-weapons/satellite-database#.WS8VoZLytaQ
>
> Apparently our sleazy politicians and spy agencies have too many secrets up
> there in Earth orbit, so the actual (portions of) databases are on a
> "demonstrable need to know" basis.
>
I wonder why? Oh! wait. The clue is in the link: 
"nuclear-weapons/space-weapons" ;)



> I think the POV community needs to know.
>

Right! Now all we need is someone with a strong Russian accent to ask 
your POTUS. ;)

-- 

Regards
     Stephen


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From: Stephen
Subject: Re: Solar System
Date: 1 Jun 2017 10:28:24
Message: <59302488$1@news.povray.org>
On 5/31/2017 3:17 PM, Bald Eagle wrote:
> Stephen <mca### [at] aolcom> wrote:
>
>> Maybe one of the smart people could help.
>
> Be sure to take your frog pills today.

Woops! Thanks for reminding me. :)

> And wipe your chin.
>
>

I have a nice young nurse to do that for me. :)

>> I knew there were a lot but seeing a visualisation puts it in
>> perspective. I wonder if there is an available data set of all the space
>> junk whizzing around the Earth?
>
>
> I think that there is.   Likely even Google has some of it.

Job done:
https://www.youtube.com/watch?v=3kBHaFcg0Z4

Actually looking at that video. My PC shut itself down and said it was 
on strike. ;)
>
> I need to figure out how to reject badly-formed data, like the E's, the MPE's,
> the MPO's, etc in the data set, so I don't have to manually delete them.
> I also need to figure out how to plot the objects that look like they have
> parabolic paths.   I haven't yet reasoned that out or investigated the equations
> and parameters for those yet.
> I can't imagine that there are things with hyperbolic orbits - but the universe
> is a surprising place.
>
> So, I have the planets, a lot of the moons, and asteroids.
>
> UV mapping of the planets and moons.
> (BTW, I really like the way your Earth looks with the normal mapping - I haven't
> gotten that far yet)
>
> A realistic starfield in the background would be nice - esp if there were some
> actual constellations in approx the right place.  That would make a very nice
> sky_sphere indeed.

Have a look at this with a downloadable image map. Paul used to be a 
regular contributor to these newsgroups.

http://paulbourke.net/miscellaneous/starfield/


> Not sure what else to throw in there - galaxies, nebulae - not sure what's large
> enough to be seen (if I fudge the scaling like I do with the planets and
> moons...)
>
> Comets would be very cool, and some of the man-made-satellite models as well.
>

No sooner said than done.
https://nasa3d.arc.nasa.gov/models

> Also on the list is a nice fly-through path for the camera to travel through the
> solar system and pause around each planetary system for a bit.
>

:)

>
> I suppose each data set for each set of objects could be worked out, and
> included in the central scene file.

Or include files that are loaded when in view.

> Things like the asteroids could be limited
> with a bailout number - which I already have implemented.
>
> ...... and if things get too unwieldly, we can always have Dick Balaska do all the
> animation frames on his render farm  ;)   :D
>
>
>

:)

-- 

Regards
     Stephen


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From: Bald Eagle
Subject: Re: Solar System
Date: 2 Jun 2017 13:05:00
Message: <web.59319a0c4e850994c437ac910@news.povray.org>
Just found this:
Haven't yet watched the POV-Ray animations....

http://meikeltroniks.de/DLR-ALT/AG_PlanPhys/SESAME/Gall_e.html


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From: Stephen
Subject: Re: Solar System
Date: 2 Jun 2017 14:21:24
Message: <5931aca4$1@news.povray.org>
On 6/2/2017 6:02 PM, Bald Eagle wrote:
> Just found this:
> Haven't yet watched the POV-Ray animations....
>
> http://meikeltroniks.de/DLR-ALT/AG_PlanPhys/SESAME/Gall_e.html
>


Hmm! I'm getting a lot of this:

404
Das angeforderte Dokument ist nicht vorhanden.
The requested URL could not be found.

And the one that did download wouldn't display, even in VLC. :(

-- 

Regards
     Stephen


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From: Bald Eagle
Subject: Re: Solar System
Date: 5 Jun 2017 09:45:00
Message: <web.5935602a4e850994c437ac910@news.povray.org>
Looks like someone else took a crack at plotting lots of asteroid data in
POV-Ray a while back:

https://www.youtube.com/watch?v=crAGTOHWqNY&feature=youtu.be


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From: Stephen
Subject: Re: Solar System
Date: 5 Jun 2017 10:40:53
Message: <59356d75$1@news.povray.org>
On 6/5/2017 2:44 PM, Bald Eagle wrote:
> Looks like someone else took a crack at plotting lots of asteroid data in
> POV-Ray a while back:
>
> https://www.youtube.com/watch?v=crAGTOHWqNY&feature=youtu.be
>

Not only that I recognise the three subscribers to the channel.


-- 

Regards
     Stephen


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From: Bald Eagle
Subject: Re: Solar System
Date: 5 Jun 2017 15:40:01
Message: <web.5935b2b24e850994c437ac910@news.povray.org>
I thought you might be interested in :

https://www.physicsforums.com/threads/gear-ratios-to-gear-tooth-count.803389/

as well as the link to the gear train calculators:

http://www.scientific601.altervista.org/gear.html

(Which was what I was trying to describe a while back)


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From: Stephen
Subject: Re: Solar System
Date: 5 Jun 2017 17:05:21
Message: <5935c791$1@news.povray.org>
On 6/5/2017 8:36 PM, Bald Eagle wrote:
> I thought you might be interested in :
>

I am, I am. But I might need to get Thomas to archive all these sites. ;-)

> https://www.physicsforums.com/threads/gear-ratios-to-gear-tooth-count.803389/
>

Any thread that talks about Meccano sets (or an Erector set for US 
readers) is okay by me. :)


> as well as the link to the gear train calculators:
>
> http://www.scientific601.altervista.org/gear.html
>
> (Which was what I was trying to describe a while back)
>


-- 

Regards
     Stephen


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From: Thomas de Groot
Subject: Re: Solar System
Date: 6 Jun 2017 02:51:21
Message: <593650e9$1@news.povray.org>
On 5-6-2017 23:05, Stephen wrote:
> On 6/5/2017 8:36 PM, Bald Eagle wrote:
>> I thought you might be interested in :
>>
>
> I am, I am. But I might need to get Thomas to archive all these sites. ;-)

:-)

I am just sitting back and watching the show...

-- 
Thomas


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From: Stephen
Subject: Re: Solar System
Date: 6 Jun 2017 11:25:13
Message: <5936c959$1@news.povray.org>
On 6/6/2017 7:51 AM, Thomas de Groot wrote:
> On 5-6-2017 23:05, Stephen wrote:
>> On 6/5/2017 8:36 PM, Bald Eagle wrote:
>>> I thought you might be interested in :
>>>
>>
>> I am, I am. But I might need to get Thomas to archive all these sites.
>> ;-)
>
> :-)
>
> I am just sitting back and watching the show...
>


It is worth watching IMO

-- 

Regards
     Stephen


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