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Rhea and Saturn by Cassini
Posted: 30.07.2006, 10:16
by jll
Posted: 30.07.2006, 17:54
by selden
It's a rather large file.
I think asking people to download something with no description of its size or subject material is inappropriate.
Where is the NASA page that describes it?
Posted: 01.08.2006, 21:50
by jll
I'm sorry for this mistake.
This film from the Cassini probe, shows Rh?©a eclipsing a Saturn portion.
The page which route me towards this film is in French
http://www.cieletespace.fr/Actualites/449_rhea,eclipse,saturne,.aspx,
The original page from NASA's site is at
http://saturn.jpl.nasa.gov/multimedia/videos/video-details.cfm?videoID=121
JLL
Posted: 01.08.2006, 21:52
by selden
Thanks!
It is a beautiful movie.
Posted: 01.08.2006, 23:00
by Christophe
Thanks for sharing this.
The resolution is impressive, for a moment I thought it came from a simulation.
Posted: 02.08.2006, 04:17
by Chuft-Captain
Compare with the Celestia version ...
CLICK on the picture
Posted: 02.08.2006, 11:38
by Johaen
Chuft-Captain wrote:Compare with the Celestia version ...
Oh wow, that's pretty neat. The moon even seems to darken against the background of Saturn, just like the real thing.
In an interplay of contrast and shadow, the moon goes dark against the planet, and then its crescent suddenly brightens as it slips in front of Saturn's night side.
Posted: 02.08.2006, 13:26
by Chuft-Captain
Johaen wrote:Chuft-Captain wrote:Compare with the Celestia version ...
Oh wow, that's pretty neat. The moon even seems to darken against the background of Saturn, just like the real thing.
In an interplay of contrast and shadow, the moon goes dark against the planet, and then its crescent suddenly brightens as it slips in front of Saturn's night side.
As you say it "seems" to darken. As in real life, it's not
really darkening, it's just your pupils adjusting to the change in contrast in response to the brighter background.
(I'm sure you already realised this
)
eg. If we minimise the effect of the bright background by
narrowing the FOV the illusion of darkening is no longer so apparent.
Posted: 02.08.2006, 13:51
by Johaen
Chuft-Captain wrote:As you say it "seems" to darken. As in real life, it's not
really darkening, it's just your pupils adjusting to the change in contrast in response to the brighter background.
(I'm sure you already realised this
)
I did, hehe
Chuft-Captain wrote:eg. If we minimise the effect of the bright background by
narrowing the FOV the illusion of darkening is no longer so apparent.
Damn, I'll have to test this one out when I get home at work. It would probably be frowned upon for me to install Celestia on a gov't computer