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Here it is... these days who can tell what NASA probes are sending us and
what is rendered... or perhaps NASA rendered all this and claim that a
probe out there sent us these pictures?
Post a reply to this message
Attachments:
Download 'sat-cas.jpg' (43 KB)
Preview of image 'sat-cas.jpg'
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"EagleSun" <nomail@nomail> wrote:
> Here it is... these days who can tell what NASA probes are sending us and
> what is rendered... or perhaps NASA rendered all this and claim that a
> probe out there sent us these pictures?
Do the rings EVER cast a shadow on the planet? Not that I have ever seen.
Nice job with this and the others.
-s
5TF!
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Wasn't it stm31415 who wrote:
>"EagleSun" <nomail@nomail> wrote:
>> Here it is... these days who can tell what NASA probes are sending us and
>> what is rendered... or perhaps NASA rendered all this and claim that a
>> probe out there sent us these pictures?
>
>Do the rings EVER cast a shadow on the planet? Not that I have ever seen.
>Nice job with this and the others.
Yes they do. Here's an actual Cassini photo:
<http://photojournal.jpl.nasa.gov/catalog/PIA06415>
--
Mike Williams
Gentleman of Leisure
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EagleSun wrote:
> Here it is... these days who can tell what NASA probes are sending us and
> what is rendered... or perhaps NASA rendered all this and claim that a
> probe out there sent us these pictures?
From the captions on photos in our Newpapers here, it seems they do
just render them .. though based on 'composite photos form Cassinni'
But they never went to the moon. Still haven't.
Cheers!
Rick Measham
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Mike Williams wrote:
> Wasn't it stm31415 who wrote:
>
>>"EagleSun" <nomail@nomail> wrote:
>>
>>>Here it is... these days who can tell what NASA probes are sending us and
>>>what is rendered... or perhaps NASA rendered all this and claim that a
>>>probe out there sent us these pictures?
>>
>>Do the rings EVER cast a shadow on the planet? Not that I have ever seen.
>>Nice job with this and the others.
>
>
> Yes they do. Here's an actual Cassini photo:
> <http://photojournal.jpl.nasa.gov/catalog/PIA06415>
In fact almost always cast a shadow.
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Thomas Lake <smi### [at] hotmail com> wrote:
> Mike Williams wrote:
> > Wasn't it stm31415 who wrote:
> >
> >>"EagleSun" <nomail@nomail> wrote:
> >>
> >>>Here it is... these days who can tell what NASA probes are sending us and
> >>>what is rendered... or perhaps NASA rendered all this and claim that a
> >>>probe out there sent us these pictures?
> >>
> >>Do the rings EVER cast a shadow on the planet? Not that I have ever seen.
> >>Nice job with this and the others.
> >
> >
> > Yes they do. Here's an actual Cassini photo:
> > <http://photojournal.jpl.nasa.gov/catalog/PIA06415>
>
> In fact almost always cast a shadow.
So, then, earth's personal perspective is relatively close to that of the
sun's and the shadows of the rings are almost entirely hidden behind the
rings themselves? Because that's a pretty massive shadow not to be seen w/
a small telescope. Here was me thinking they just weren't dense enough to
cast a shadow. Well, you learn something new every day.
-s
5TF!
Post a reply to this message
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"stm31415" <sam### [at] cscom> wrote:
> Thomas Lake <smi### [at] hotmailcom> wrote:
> > Mike Williams wrote:
> > > Wasn't it stm31415 who wrote:
> > >
> > >>Do the rings EVER cast a shadow on the planet? Not that I have ever seen.
> > >>Nice job with this and the others.
> > >
> > >
> > > Yes they do. Here's an actual Cassini photo:
> > > <http://photojournal.jpl.nasa.gov/catalog/PIA06415>
> >
> > In fact almost always cast a shadow.
>
> So, then, earth's personal perspective is relatively close to that of the
> sun's and the shadows of the rings are almost entirely hidden behind the
> rings themselves? Because that's a pretty massive shadow not to be seen w/
> a small telescope. Here was me thinking they just weren't dense enough to
> cast a shadow. Well, you learn something new every day.
You never get to see shadows of Saturn's rings from earth because we're
always looking at it face-on. Saturn is always behind us. Cassini
approached Saturn from the side and therefore got to see the shadow. We'll
never see the shadow from earth.
Post a reply to this message
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> You never get to see shadows of Saturn's rings from earth because we're
> always looking at it face-on. Saturn is always behind us. Cassini
> approached Saturn from the side and therefore got to see the shadow.
We'll
> never see the shadow from earth.
Saturn is 9.54 AU away from the sun (Earth is 1), so the maximum possible
angle between our line of sight to Saturn and the incoming light direction
on Saturn is 2*asin(.5/8) = 7.2 degrees. So it should be possible to see a
sliver of the shadow when our orbits are in the right positions.
- Slime
[ http://www.slimeland.com/ ]
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"Slime" <fak### [at] emailaddress> wrote:
> > We'll never see the shadow from earth.
>
> Saturn is 9.54 AU away from the sun (Earth is 1), so the maximum possible
> angle between our line of sight to Saturn and the incoming light direction
> on Saturn is 2*asin(.5/8) = 7.2 degrees. So it should be possible to see a
> sliver of the shadow when our orbits are in the right positions.
>
> - Slime
> [ http://www.slimeland.com/ ]
Cool! I thought we might see a little of it with super-powerful telescopes
:)
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Slime wrote:
>>You never get to see shadows of Saturn's rings from earth because we're
>>always looking at it face-on. Saturn is always behind us. Cassini
>>approached Saturn from the side and therefore got to see the shadow.
>
> We'll
>
>>never see the shadow from earth.
>
>
> Saturn is 9.54 AU away from the sun (Earth is 1), so the maximum possible
> angle between our line of sight to Saturn and the incoming light direction
> on Saturn is 2*asin(.5/8) = 7.2 degrees. So it should be possible to see a
> sliver of the shadow when our orbits are in the right positions.
>
> - Slime
> [ http://www.slimeland.com/ ]
>
>
Impressive as usual. But I do wonder if I am the only one who does not
make an immediate intuitive connection between 9.54 and .5/8? And
149,598,000,000 for that matter? :(
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