Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

NASA to make next Mars announcement today

  1. Nov 5, 2015 #1

    DaveC426913

    User Avatar
    Gold Member

  2. jcsd
  3. Nov 5, 2015 #2

    davenn

    User Avatar
    Science Advisor
    Gold Member

    uh huh, heard it on the TV this morning before going to work

    stripped by the solar wind ..... I thought ... well that was a revelation !! :rolleyes::rolleyes: ... NOT ...

    That has been the primary assumption for some yrs

    lack of a signif magnetic field, lower gravity, being the primary helpful factors
    towards the solar wind having a stronger effect

    Dave
     
  4. Nov 5, 2015 #3

    marcus

    User Avatar
    Science Advisor
    Gold Member
    Dearly Missed

    Press release 5 November:
    https://www.nasa.gov/press-release/...ed-of-solar-wind-stripping-martian-atmosphere
    The MAVEN mission collected more data about solar wind at Mars allowing them to go into more detail about how 99% of the original atmosphere was stripped. Most of it fairly early on.

    The conclusion: more confidence about the scenario that most of Mars water went off into space rather than getting stored as underground ice.

    Mars looks increasingly like a comparatively poor prospect for human settlement/space industry.

    Ceres, with a thick layer of ice beneath its surface, looks like a better prospect--probably more inhabitable below-ground, with a better supply of industrial raw materials. Lower gravity means people and materials easier and safer to land and take off.

    Mars base probably a dead-end--by comparison a waste of time and resources
     
    Last edited: Nov 5, 2015
  5. Nov 5, 2015 #4

    DaveC426913

    User Avatar
    Gold Member

    They stressed that it was particularly solar storms that did the most damage, disproportionate to their frequency/
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook