Date: 30/03/2019 20:04:29
From: Tau.Neutrino
ID: 1368529
Subject: Rivers on Mars raged for more than a billion years....

Rivers on Mars raged for more than a billion years, according to new study

Mars had large rivers of liquid water long after its atmosphere was stripped away into space billions of years ago, a new study suggests.

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Date: 30/03/2019 20:11:09
From: Tau.Neutrino
ID: 1368539
Subject: re: Rivers on Mars raged for more than a billion years....

A few questions.

Has the Mars atmosphere stabilised or is it still loosing its atmosphere or is it in a loosing and gaining cycle or something else?

Did the water on Mars go with the atmosphere or has it retreated more underground or both or something else again?

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Date: 30/03/2019 20:35:11
From: sibeen
ID: 1368568
Subject: re: Rivers on Mars raged for more than a billion years....

Tau.Neutrino said:


A few questions.

Has the Mars atmosphere stabilised or is it still loosing its atmosphere or is it in a loosing and gaining cycle or something else?

Did the water on Mars go with the atmosphere or has it retreated more underground or both or something else again?

The atmospheric pressure is only 600 Pascal, so about 0.6% of Earth’s. At this pressure the boiling point of water is going to be around -40°.

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Date: 30/03/2019 20:38:39
From: Tau.Neutrino
ID: 1368571
Subject: re: Rivers on Mars raged for more than a billion years....

The atmospheric pressure would have been denser 3.7 billion years ago, when its magnetic field was still operating.

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Date: 30/03/2019 20:56:50
From: mollwollfumble
ID: 1368585
Subject: re: Rivers on Mars raged for more than a billion years....

I have an astrophysics book called “planetary sciences”. It’s a superb book.

It explains how the atmospheres of Venus, Earth and Mars have grown thicker with time as a result of comet impacts.

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Date: 30/03/2019 21:09:00
From: Tau.Neutrino
ID: 1368588
Subject: re: Rivers on Mars raged for more than a billion years....

mollwollfumble said:


I have an astrophysics book called “planetary sciences”. It’s a superb book.

It explains how the atmospheres of Venus, Earth and Mars have grown thicker with time as a result of comet impacts.

This one?

Planetary Sciences
Imke de Pater, Jack J. Lissauer
HardCoverJanuary 29, 2015

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Date: 30/03/2019 21:14:30
From: mollwollfumble
ID: 1368591
Subject: re: Rivers on Mars raged for more than a billion years....

Tau.Neutrino said:


mollwollfumble said:

I have an astrophysics book called “planetary sciences”. It’s a superb book.

It explains how the atmospheres of Venus, Earth and Mars have grown thicker with time as a result of comet impacts.

This one?

Planetary Sciences
Imke de Pater, Jack J. Lissauer
HardCoverJanuary 29, 2015

Yes, that one. It’s the best book ever written by an astrophysicist, being easy to understand, readable from cover to cover, thorough, and great as a reference book.

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