On a ring origin of the equatorial ridge of Iapetus |
On a ring origin of the equatorial ridge of Iapetus |
Guest_AlexBlackwell_* |
Aug 29 2006, 06:18 PM
Post
#1
|
Guests |
Wing Ip just had an interesting Iapetus-related paper published in GRL.
|
|
|
Sep 8 2006, 01:18 PM
Post
#2
|
|
Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
Hello Bill - nice to know it's not just the 4 or 5 of us here exchanging hand signals! Ugordan I agree with you about randomly ejected material - that's why I prefer a disintegrating moon in an equatorial orbit for the source of the material.
|
|
|
Sep 8 2006, 01:40 PM
Post
#3
|
|
Member Group: Members Posts: 903 Joined: 30-January 05 Member No.: 162 |
Hello Bill - nice to know it's not just the 4 or 5 of us here exchanging hand signals! Ugordan I agree with you about randomly ejected material - that's why I prefer a disintegrating moon in an equatorial orbit for the source of the material. Please check out the Planetary Rings chapter in the New Solar System book. It made me a believer. That a sufficient quantity of materials originally in, let's say a 45 degree inclined orbit, could all wind up in the equatorial plane seems counterintuitive. But it can. Oblateness of the primary causes the materials to spread out around the primary. Once this happens, the materials start colliding amongst themselves, twice per orbit. Half the collisions occur as materials pass north to south over the equator, and half occur as the materials pass south to north, 180 degrees around. Result is to pulverize the chunks, and put them into an equatorial orbit. Pierre Laplace came up with the idea a very long time ago. |
|
|
Lo-Fi Version | Time is now: 31st October 2024 - 11:13 PM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE COPYRIGHT |
OPINIONS AND MODERATION Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators. |
SUPPORT THE FORUM Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member. |