POV-Ray : Newsgroups : povray.binaries.animations : PoVSolar: new animation Server Time
31 Oct 2024 16:14:13 EDT (-0400)
  PoVSolar: new animation (Message 1 to 5 of 5)  
From: Jörg 'Yadgar' Bleimann
Subject: PoVSolar: new animation
Date: 13 May 2009 18:39:13
Message: <4a0b4c11$1@news.povray.org>
High!

A flight around Jovian moon Amalthea:
http://www.youtube.com/watch?v=iGbcV5yqgRM&feature=channel

See you on www.khyberspace.de!

Yadgar


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From: andrel
Subject: Re: PoVSolar: new animation
Date: 24 May 2009 08:10:33
Message: <4A193931.2050506@hotmail.com>
I think that if the sum lit jupiter I would expect it to light the moon 
also in some comparable way. And I would expect to be blinded at some 
point by the sun. What about the light that comes off off jupiter, I 
assume you didn't use radiosity.


> High!
> 
> A flight around Jovian moon Amalthea:
> http://www.youtube.com/watch?v=iGbcV5yqgRM&feature=channel
> 
> See you on www.khyberspace.de!
> 
> Yadgar


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From: Jörg 'Yadgar' Bleimann
Subject: Re: PoVSolar: new animation
Date: 30 May 2009 14:48:35
Message: <4a217f83@news.povray.org>
High!

andrel wrote:
> I think that if the sum lit jupiter I would expect it to light the moon 
> also in some comparable way.

It is lit in a comparable way - but Amalthea's surface is very dark 
(albedo 0.09)!

> And I would expect to be blinded at some 
> point by the sun. 

 From Jupiter, the sun appears only one fifth as large as from Earth... 
so at first, I even wondered whether it would show up at all - it's 
hardly discernible from the background stars! Perhaps using Chris 
Colefax' lens flare macros could help...

What about the light that comes off off jupiter, I
assume you didn't use radiosity.

In fact I did! But, as I mentioned before, Amalthea is very dark...

See you in Khyberspace!

Yadgar


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From: Alain
Subject: Re: PoVSolar: new animation
Date: 30 May 2009 21:41:20
Message: <4a21e040$1@news.povray.org>
Jörg 'Yadgar' Bleimann nous illumina en ce 2009-05-30 14:48 -->
> High!
> 
> andrel wrote:
>> I think that if the sum lit jupiter I would expect it to light the 
>> moon also in some comparable way.
> 
> It is lit in a comparable way - but Amalthea's surface is very dark 
> (albedo 0.09)!
A piece of coal may have a larger albedo!
> 
>> And I would expect to be blinded at some point by the sun. 
> 
>  From Jupiter, the sun appears only one fifth as large as from Earth... 
> so at first, I even wondered whether it would show up at all - it's 
> hardly discernible from the background stars! Perhaps using Chris 
> Colefax' lens flare macros could help...
> 
> What about the light that comes off off jupiter, I
> assume you didn't use radiosity.
> 
> In fact I did! But, as I mentioned before, Amalthea is very dark...
> 
> See you in Khyberspace!
> 
> Yadgar

Amalthéa is so dark, that you'd make it brighter by painting it all over with 
your usual black paint. ;)
I think that Pluto's albedo is even lower...


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From: Christian Froeschlin
Subject: Re: PoVSolar: new animation
Date: 31 May 2009 10:27:10
Message: <4a2293be$1@news.povray.org>
Alain wrote:

> I think that Pluto's albedo is even lower...

actually, Pluto seems to be rather on the bright side of life as
concerns the albedo (about 0.5 with high variabilty across surface,
higher than Earth, according to most sources I could find). Of course,
it doesn't really get a lot of sunlight to appreciate it ;)


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