NASA to make next Mars announcement today

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Discussion Overview

The discussion revolves around an anticipated announcement from NASA regarding findings related to the Martian atmosphere, particularly focusing on the effects of solar wind and the implications for Mars' habitability and potential for human settlement.

Discussion Character

  • Debate/contested
  • Exploratory
  • Technical explanation

Main Points Raised

  • Some participants express skepticism about the significance of the announcement, suggesting it may only confirm existing assumptions about Mars' atmosphere and its loss due to solar wind.
  • One participant notes that the stripping of Mars' atmosphere by solar wind has been a primary assumption for years, attributing this to the planet's lack of a significant magnetic field and lower gravity.
  • A later post references data from the MAVEN mission, indicating that 99% of Mars' original atmosphere was stripped away, with most occurring early in the planet's history.
  • Some participants propose that the findings may lead to a reevaluation of Mars as a viable location for human settlement, suggesting that Ceres might be a more promising alternative due to its subsurface ice and resources.
  • There is mention of solar storms having a disproportionate effect on the atmosphere, which was emphasized in the discussion.

Areas of Agreement / Disagreement

Participants do not reach a consensus; there are competing views on the implications of the findings for Mars' habitability and the significance of the announcement itself.

Contextual Notes

Some limitations include the dependence on existing assumptions about solar wind effects and the unresolved nature of Mars' atmospheric history. The discussion reflects uncertainty regarding the future of human exploration and settlement on Mars compared to other celestial bodies.

DaveC426913
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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
 
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
 
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davenn said:
lack of a signif magnetic field, lower gravity, being the primary helpful factors
towards the solar wind having a stronger effect

Dave
They stressed that it was particularly solar storms that did the most damage, disproportionate to their frequency/
 
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