Cassini - Three Moons

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Author Message
mann

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Reply: 7



PostPosted: January 25, 2005 10:31 PM 

Um3k, do you see the rings? They orbit the center of the planet. i thought all moons did also.

um3k

Posts: 898

Reply: 8



PostPosted: January 27, 2005 1:19 PM 

The moons do orbit the center of the planet.

mann

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Reply: 9



PostPosted: January 27, 2005 1:39 PM 

ok then. thanks.

Then they orbit, through the inside of the ring, or outside. Crossing patterns, must get hairy at times, of course thats why we have the rings.

Halitosis

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Reply: 10



PostPosted: January 27, 2005 3:48 PM 

The rings don't extend for an infinite distance, and they don't extend right from the planet's surface.

Regardless, I'm not sure how something following a path at all orbit-like wouldn't go through the rings at some point or another if it were within the proper range.. Thus, all of Saturn's moons (of any serious size) are either orbiting inside the rings, or outside the rings.

mann

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Reply: 11



PostPosted: January 27, 2005 6:45 PM 

Thanks for picking up on my train of thought Hal.
A moon crossing Through the ring, That might make for a good stereo image.

Halitosis

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Reply: 12



PostPosted: January 28, 2005 3:59 PM 

A big object passing through the rings would make a good image, stereo or not.. but there's no way a 'moon' that passed through the rings would remain a 'moon' for long. I fail to see how an object that crashed through the rings multiple times (much less once) would ever reach any moon-type orbit.

Halitosis

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Reply: 13



PostPosted: January 28, 2005 6:09 PM 

Actually, I suppose if an object were tough enough it could simply swing through the rings a few times until it lost enough momentum to end up orbiting inside the rings..

um3k

Posts: 898

Reply: 14



PostPosted: January 28, 2005 6:43 PM 

I think you guys need to brush up on your orbital mechanics or the Saturnian system or something.

Halitosis

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Reply: 15



PostPosted: January 29, 2005 12:13 AM 

How so?

Aibo

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Reply: 16



PostPosted: January 29, 2005 9:32 PM 

The Saturnian system with rings and moons are very well ordered with all larger and smaller moons outside the rings. Only some few really tiny moons are within the ring system itself.

You really havnt read ANY textbooks on astronomy? Well im happy to tell in any case:
I think some of you guys here are fooled by the geometry of the image, the small moons that appear to be below the ringplane are in fact much closer to Cassini.

alan

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Reply: 17



PostPosted: January 29, 2005 10:41 PM 

Now this is weird. One of the larger moons appears to be inside the f-ring.
FullS08/N00027163.jpg

alan

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Reply: 18



PostPosted: January 29, 2005 10:42 PM 

http://saturn.jpl.nasa.gov/multimedia/images/raw/raw-images-details.cfm?feiImageID=30642

Halitosis

Posts: no

Reply: 19



PostPosted: January 30, 2005 12:22 AM 

There's no reason why a 'large' (whatever you want to consider large) object couldn't orbit around Saturn inside the ring. It would probably be a rarer event than Saturn capturing an object that then orbited outside the ring, but it still must be possible..

um3k

Posts: 898

Reply: 20



PostPosted: January 30, 2005 1:10 AM 

However, if a large object orbited inside the ring, it would create a gap in the ring quite a bit larger than itself.

Halitosis

Posts: no

Reply: 21



PostPosted: January 30, 2005 1:17 AM 

By 'inside' I don't mean in the ring, I mean inside the ring's innermost extent. Thus, if the ring stretched from 100000 km to 200000 km away, a moon orbiting at 50000 km would be 'inside' the ring.

um3k

Posts: 898

Reply: 22



PostPosted: January 30, 2005 12:39 PM 

Oh, ok.

If you wanna read about weird orbiting, look up Janus and Epimetheus.

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