Comments on: The Rains Of Mars

By: jonesdave

jonesdave — Fri, 26 May 2017 20:44:04 +0000

You appear to have just put words on a string there. They don’t actually make any sense. Care to be more specific?

By: jonesdave

jonesdave — Fri, 26 May 2017 20:41:28 +0000

No, there is only mystery if you don’t understand the science. Of course Mars had a thicker atmosphere in the past. It would have still retained much of the heat from its formation. Much of that would have been expressed as volcanism. Volcanism = lots of CO2 and H2O (greenhouse gases) in the atmosphere. So, the solar output being ~30% lower at 4.5Ga, pales into insignificance besides that. Unfortunately, Mars cooled down relatively quickly. It’s smaller than Earth. Surface area to volume ratio. So, I’m struggling to see what the undefined ‘mystery’ is here.

By: rommeytx

rommeytx — Wed, 24 May 2017 14:05:46 +0000

I long the days when the first amendment didn’t mean that every idiot could open their mouths and be celebrated as a worthy thinker… You know, the first requisite for a scientific education is the recognition that scientific sense begins with common sense. Which tells me that conclusions drawn from an incompletely defined universe, are just entertainment. Before wasting the time guessing how the Mars geology and geography was achieved, try getting an in-depth understanding on Mars morphology. The times to disabuse freshmen ideas is long gone. Prior learning and common sense are pre-requisites for this class…

By: jpatrick

jpatrick — Tue, 23 May 2017 13:31:27 +0000

Four billion years ago, the sun ought to have been cooler and less bright. That’s not terribly consistent with liquid water on Mars at that time. You could argue that Mars had an atmosphere that trapped enough heat, but really? There’s a lot of mystery here.