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View Full Version : does mars have a ring?



damienpaul
2004-Jan-06, 04:22 AM
i just read another article that suggests that mars may have a ring around it shepherded by phobos and diemos in a similar manner to those of the gas giants. what does the UT forum think?

Littlemews
2004-Jan-06, 04:25 AM
No, there is none :) LOL by the way, where did find those articles? :(

damienpaul
2004-Jan-06, 04:28 AM
scientific american special...lol i thought mars wouldn't have one

DippyHippy
2004-Jan-08, 12:52 AM
Is there a link to an online article about this? I'd be interested to read it :)

damienpaul
2004-Jan-12, 01:13 AM
i am trying to find the original article... but here is an earlier one, it is an obscure reference...

http://www.sciam.com/article.cfm?articleID...5880000&catID=2 (http://www.sciam.com/article.cfm?articleID=00051A96-E46D-1CF2-93F6809EC5880000&catID=2)

the article that i read had a justification that mars' moons may 'shepherd' the ring in a similar way that has been observed around the 4 gas giants.

Matthew
2004-Jan-12, 04:01 AM
If Mars had a ring, even if it was very faint it would probably be common knowledge. Considering that we and have had many orbiters orbiting the planet, and we've also had extremely high resolution photos studied, surely any such rings would have shown up when Mars was at its closest last year.

damienpaul
2004-Jan-12, 04:07 AM
thats what i was thinking until i read the article. yes i'd think it would be extraordinarily thin if it existed. perhaps it is a broken ring, in sections - i think they exist around the other ringed planets. Imagine if such a ring was found? what would it consist of?

Littlemews
2004-Jan-12, 04:21 AM
Dust and Icy maybe

damienpaul
2004-Jan-12, 04:26 AM
perhaps like the dust that exist near some of the more stable lagrange points of the earth-sun system

Littlemews
2004-Jan-12, 07:22 PM
I found something about Ring Cycling :)
See : http://www.astrobio.net/news/article717.html

Matthew
2004-Jan-13, 01:09 AM
I don't think the two small Mars moons would be enough to 'recycle' a ring. Anyway, the two Martian moons are believed to have been caught by the planet AFTER its formation, so any rings the Mars had probably fallen into Mars by the time the two moons had arrived.

damienpaul
2004-Jan-13, 03:31 AM
Is it at all possible then, that a new one is formaing at the Lagrange points of the Mars-Phobos/Diemos system?

Guest_jimmy
2004-Feb-07, 12:52 PM
Originally posted by Littlemews@Jan 6 2004, 04:25 AM
No, there is none :) LOL by the way, where did find those articles? :(
:blink: that just great!! not :P

Skywise
2004-Feb-08, 09:39 PM
No, Mars does not currently have a ring or rings. But YES, very likely, Mars will one day have a ring system. Phobos, Mar's larger and inner moon, is doomed in that its orbit is below synchronous altitude (less than 6000 km above Mars) and is losing altitude by a bit less than 2 meters per century.

One of two things will happen to Phobos sometime in the next 50 million years or so:
1) it will crash onto the surface of Mars, or
2) (more likely) it will break up and form a ring system

Bill Arnett has a great resource (inlcuding the information above) on Phobos at:
http://seds.lpl.arizona.edu/nineplanets/ni...ets/phobos.html (http://seds.lpl.arizona.edu/nineplanets/nineplanets/phobos.html)

Hope this helps!

- Skywise

DippyHippy
2004-Feb-10, 12:46 AM
Yeah, I'm more inclined to agree with Skywise and matthew... Mars has had so many probes orbiting and landing on it that surely any ring would have been found by now. The idea of ring arcs (albeit extremely tenuous and faint ones) is intriguing though. Maybe they've escaped detection so far.

Guest
2004-Feb-13, 04:00 AM
I think recent data has shown that Phobos is not in fact in a decaying orbit.

zephyr46
2004-Feb-13, 05:00 AM
I guess there could be more fine dust, possible even from mars itself, I beleive Io leaves a sulfur trail, from the volcanoes, possible, in the active times on mars, debris from Olympus Mons was ejected into the near exosphere of Mars. If there is a ring, that would be my guess as to how it got there. (I hope there is one)