On Sun, 31 Jan 2010 01:31:22 +0200, Agustin Britait Molina  
<agu### [at] hotmailcom> wrote:

> You allow a criticism, I hope constructively.
>
> Technically the picture is outstanding, this done entirely with POV? As  
> an IRTC
> I suppose, a great job.
>
> However, the criticism is in design: the image is too heavy, has too many
> things.
>
> The images of deep space have to give the impression that we are looking  
> at
> infinity, we look to the void, this picture gives the contrary  
> impression, we
> are in the midst of a crowded city. At least in my view should not be.
>
> I could remove the second planet ring (red), he excess, and the ship in  
> the
> left, the image stays the same technique and outstanding, but less  
> saturated
> with things.
>
> Another possible solution would be to use an image size larger to get  
> the same
> items, with this you get a spacious feeling without losing the things  
> that you
> created, or reduce slightly the size of the elements.
>
> As for realism, is not possible, by the gravitational forces involved,  
> have a
> multiple system of planets like the ring samples, the rings are formed by
> gravitational stability (they are like dust settled) in a system with  
> several
> massive bodies, these rings would end shredded sooner or later.
>
> I hope these words do not detract your great work, a greeting.
>

Thank you for your input, I was looking for critique :)

Maybe I should move the camera more backwards, to give the impression of  
infinity. I will play around with the scale of the planets and rings some  
more.


-- 
-Nekar Xenos-
"The spoon is not real"

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On Sun, 31 Jan 2010 16:53:47 +0200, Christian Froeschlin <chr### [at] chrfrde>  
wrote:

> The clouds on the earth-like planet look nice. The rings feel
> out of place on terrestial-mass planets, and they most certainly
> can't be stable in such a close binary system. Also, the four
> astronomical bodies seem a bit artificially lined up, as do
> the perfectly parallel tilts of the two planets.
>
> BTW the rings look like they're perfectly edge-on to the
> sun (spring/autumn equinox) and probably wouldn't cast any
> shadow at all (the average thickness of Saturns rings is
> only on the order of tens of meters on average).

I think I'll remove the second moon and play around with the scale of the  
planets. Hmm, I like planet rings, but the realistic option would be more  
like Avatar's Pandora and I wouldn't want to copy... ;)
Maybe I should take the planets even further apart, and add thicker  
atmospheres to both planets, so that it becomes a mixture of terrestrial  
and gas planet? Do you think there is a viable way to make a figure 8  
ringed binary system work or at least seem more realistic? Hmm... I  
remember Grey Knight worked it all out long ago on this group and came to  
the conclusion that there would be a "ring-storm" every 13-years if the  
planets were the size of earth and they were as far apart from each other  
as the moon is from the earth...

BTW the rings are discs, so in this case they _are_ infinitely thin. The  
sun is at a slight angle which is why you can see the shadow.

-- 
-Nekar Xenos-
"The spoon is not real"

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> The clouds on the earth-like planet look nice. The rings feel
> out of place on terrestial-mass planets, and they most certainly
> can't be stable in such a close binary system. Also, the four
> astronomical bodies seem a bit artificially lined up, as do
> the perfectly parallel tilts of the two planets.
>
> BTW the rings look like they're perfectly edge-on to the
> sun (spring/autumn equinox) and probably wouldn't cast any
> shadow at all (the average thickness of Saturns rings is
> only on the order of tens of meters on average).

Normaly, when you have binary systems like that, you expect the two to 
have parallel axis. After all, they where formed at the same time, from 

probably be tidaly locked as such a close proximity.

There is no known lower limit to the radius of a planet that would 
prevent it from having a ring system. They feel out of place because our 
planet don't have any perseptible ring, but we do have an extremely thin 
one composed of fine, very diffuse, silt like, dust. It's TOTAL mass is 
estimated to be no more that 10 tons spread in a ring over 2000km whide 
in an area above that of the geostationary satellites (about 30 to 48 
hours orbital period).

Looking at the rings, they are not perfectly edge on to the sun, just a 
few day before or after the equinox. Otherwise, the rings would be much 
darker as they would self shadow.


Alain

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Alain wrote:

> Normaly, when you have binary systems like that, you expect the two to 
> have parallel axis. After all, they where formed at the same time, from 


True, but the alignment wouldn't be exact as they get pummeled by
collisions in the early stages and there are also other effects such
as precession.

> They would very probably be tidaly locked as such a close proximity.

Yes. Interesting point, I never thought about whether tidal locking
changes the axis of rotation in addition to just slowing it down.

> Looking at the rings, they are not perfectly edge on to the sun, just a 
> few day before or after the equinox. 

You're right.

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> Alain wrote:
>
>> Normaly, when you have binary systems like that, you expect the two to
>> have parallel axis. After all, they where formed at the same time,

>
> True, but the alignment wouldn't be exact as they get pummeled by
> collisions in the early stages and there are also other effects such
> as precession.
Statisticaly, the colisions on both planets would be the same, the shift 
would be less than a few second arc, maybe less than 1 second. That's 
not perceptible as it's only shift the axis by something like 1 to 4 km 
at most.
As for precession, it only causes a wobble, and will affect both planets 
equaly.
>
>> They would very probably be tidaly locked as such a close proximity.
>
> Yes. Interesting point, I never thought about whether tidal locking
> changes the axis of rotation in addition to just slowing it down.
Tidal lock makes the axis parallel.
>
>> Looking at the rings, they are not perfectly edge on to the sun, just
>> a few day before or after the equinox.
>
> You're right.
>

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