Iapetus - Black on white or white on black? |
Iapetus - Black on white or white on black? |
Sep 14 2007, 07:40 AM
Post
#1
|
|
Member Group: Members Posts: 813 Joined: 8-February 04 From: Arabia Terra Member No.: 12 |
Seems to be a lot of dispute on this subject... I think it's ice from the interior, but what does everyone else think?
Edit: This world seems very complex so the question could perhaps be phrased as 'which of these options is most responsible for the Iapetan dichotomy?' |
|
|
Sep 24 2007, 10:04 PM
Post
#2
|
|
Senior Member Group: Members Posts: 3008 Joined: 30-October 04 Member No.: 105 |
My first, and continuing, impression of the dichotomy on Iapetus is that the object got splatted with a cosmic tomato. It looks like something was spattered, sputtered or applied to the leading side.
I've found my first example of an impact on the white snowy areas leaving rays from the dark reqolith. N00092009, located in the Voyager Mountains. Looks like an impact dead-centered on a peak. I did an "RGB" composite image from IR1-GRN-UV3 frames taken at the time. Registration was poor, colr balance was pitiful and I won't inflict it upon you, but the color value of the rays was the same as the weathered regolith surface. An observation presented FWIW. -------------------- |
|
|
Sep 25 2007, 02:48 AM
Post
#3
|
|
Member Group: Members Posts: 809 Joined: 11-March 04 Member No.: 56 |
I've found my first example of an impact on the white snowy areas leaving rays from the dark reqolith. N00092009, located in the Voyager Mountains. Looks like an impact dead-centered on a peak. I don't have a problem believing that in that case we have dark layered on top of white which is in turn (over on the opposite side from the impact site) layered on top of dark again. |
|
|
Lo-Fi Version | Time is now: 23rd September 2024 - 03:52 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. |