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suntrack2
2006-May-14, 02:15 PM
The Saturn is a great planet and interesting one. The rings of the Saturn are suit perfectly with its size. There is a great possibility of "low temperature zone on Saturn permanently due to the shadow of the Saturn rings on the main ball. May be this zone is in dark round the solar year.

I don't know whether cassini has point out about the reality of Saturn ring's shadow on the planet.

The bottom portion of the Saturn may be cover with the shadow of the Saturn rings when the sun is on upper side of the planet, but when we observe from the earth the rings are eighter appears in tilt or in horizontal line.

And if the saturn rings are transparent then there is least possibility of dark shadow on the bottom portion of the Saturn.

In such condition the normal temperature may also vary than the upper portion of the planet.

I want your guidance here and the reality about ring shadow on the Saturn.

Sunil

Nowhere Man
2006-May-14, 03:14 PM
Saturn's rings do indeed cast a shadow on the clouds. This was known long before Cassini was even launched. However, I don't know how complete the light blockage is, or what effects it has on the weather.

But the ring shadow does not cover the same region all the time. Because Saturn's axis is tilted relative to its orbital plane, the shadow moves from north to south and back again over the course of a Saturnian year. At the solstices, the shadow is at its widest and is located in the hemisphere that is tilted away from the sun. At the equinoxes, it is at its narrowest and is located on the horizon.

Because of this, I would not be suprised if Saturnian winters are a bit colder than they would be without the rings.

Fred

Joedog
2006-May-14, 03:53 PM
The shadow of the rings is currently on the northern half of Saturn.
No spot on Saturn stays in the shadow permanently.

http://img211.imageshack.us/img211/9436/pia08166modest2de.th.jpg (http://img211.imageshack.us/my.php?image=pia08166modest2de.jpg)

George
2006-May-14, 07:15 PM
Nice image. Is it an APOD?

The blue regions are due to the Rayleigh Scattering effect as sunlight scatters off hydrogen and other upper atmospheric particles.

The moon above the ring plane sure stands out.

Joedog
2006-May-14, 07:42 PM
That picture is just one of Cassini`s beauty shots.
I also like this one
http://img295.imageshack.us/img295/3971/titan5df.th.jpg (http://img295.imageshack.us/my.php?image=titan5df.jpg)

George
2006-May-15, 12:42 PM
Yes, Cassini has produced some fantastic images.

Please scale it down for the sake of board. I like to use thumbnails using ImageShack.

Joedog
2006-May-16, 07:39 PM
Will do..
Thanks

George
2006-May-16, 08:32 PM
Will do..
ThanksThank you. I look forward to seeing more of your images.

Joedog
2006-May-17, 05:11 AM
JPL had this one on the front page today

http://img217.imageshack.us/img217/1680/pia077860dq.th.jpg (http://img217.imageshack.us/my.php?image=pia077860dq.jpg)

George
2006-May-17, 12:57 PM
Nice. The rings look as icy as they really are. Epimetheus is looking a little rough, as usual. :)

Joedog
2006-May-18, 12:32 AM
I really like this stark view.

This amazing perspective view captures battered Mimas against the hazy limb of Saturn.

It is obvious in such close-up images that Mimas (397 kilometers, or 247 miles across) has been badly scarred by impacts over the eons. Its 130 kilometer- (80 mile-) wide crater, Herschel, lies in the darkness at right.

http://img205.imageshack.us/img205/9316/pia08172br5003fc.th.jpg (http://img205.imageshack.us/my.php?image=pia08172br5003fc.jpg)