IPB

Welcome Guest ( Log In | Register )

 
Reply to this topicStart new topic
Landing in Hellas
dvandorn
post Feb 8 2009, 04:04 AM
Post #1


Senior Member
****

Group: Members
Posts: 3254
Joined: 9-February 04
From: Minneapolis, MN, USA
Member No.: 15



It occurs to me that, with the exception of the one Soviet attempt, there have not been any serious proposed landing sites within Hellas.

The atmosphere is thicker at the floor of the basin than elsewhere on the planet, offering both more effective parachute braking (and thus a heavier lander, potentially) and the rare possibility of liquid standing water. There are more clouds and therefore a potentially more active hydrologic cycle. Rainfall on Mars post-dated the basin formation, as there are dry riverbeds observed on both the inner and outer slopes of the basin walls. And while some of Hellas' interior appears to be relatively unaltered lava fill, some good amount of it appears altered, while a small but significant portion of the basin floor appears not to have been covered by lava fill at all.

Is the only negative to a Hellas landing the fact that it's not representative of the rest of the planet? I'd think the interesting positives would outweigh that negative, especially when Mars sports such a wide variety of terrains and surface conditions...

-the other Doug


--------------------
“The trouble ain't that there is too many fools, but that the lightning ain't distributed right.” -Mark Twain
Go to the top of the page
 
+Quote Post
Phil Stooke
post Feb 8 2009, 04:55 AM
Post #2


Senior Member
****

Group: Members
Posts: 5817
Joined: 5-April 05
From: Canada
Member No.: 227



These days a lot would depend on the chemistry of the surface - everybody's keen to go after clays or salts. I don't know about the composition of materials in Hellas. And given the concerns about the latitude of Terby crater for MSL - an attractive site but too far south - Hellas would be even worse for quite a few years yet, until the seasons favor the south again. (Terby is on the north edge of Hellas).

Phil


--------------------
... because the Solar System ain't gonna map itself.
Go to the top of the page
 
+Quote Post

Reply to this topicStart new topic

 



RSS Lo-Fi Version Time is now: 26th November 2014 - 11:02 PM
RULES AND GUIDELINES
Please read the Forum Rules and Guidelines before posting.

IMAGE COPYRIGHT
Images posted on UnmannedSpaceflight.com may be copyrighted. Do not reproduce without permission. Read here for further information on space images and 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 a project of the Planetary Society and is funded by donations from visitors and members. Help keep this forum up and running by contributing here.