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How could Mars have once had oceans? It has 37% mass of Earth..

 
gnfr
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01/27/2021 09:09 PM
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How could Mars have once had oceans? It has 37% mass of Earth..
Just reading about new NASA Mars rover and all its new capabilities. Higher speed travel, microphones and HD cameras to document the entire landing. Etc... They are landing in an area believed to possibly be rich in ancient life.. then it occurred to me.

How could Mars have ever had an atmosphere that had oceans and, presumably life, when it has 37% the mass of the Earth? Throwing OUT the fact Mars is 34 million miles further away from the Sun, The density of our atmosphere is dictated by the gravity of the Earth. Presuming the star at the center of our solar system is amenable to allowing a couple of circling rocks to attract an atmosphere, the planets mass, mathematically, dictates how much "atmosphere" it can 'retain.

Even with a more 'friendly' Sun, how could Mars have retained ANY kind of atmospheric density that resembles Earth, with oceans, with only 37% the mass of the Earth?

On Earth at 7,500 feet of altitude, water boils at a 198° and evaporates faster.. thats our gravity, a mile and quarter away from from sea-level.
Anonymous Coward
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01/27/2021 09:11 PM
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Re: How could Mars have once had oceans? It has 37% mass of Earth..
All Martian water was sucked to moon and spilled over hot earth causing continental drift and balloon effect
Anonymous Coward
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01/27/2021 09:12 PM
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Re: How could Mars have once had oceans? It has 37% mass of Earth..
Mars is a mere orb of light in the sky. The earth is flat.
Temporal Recon
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01/27/2021 09:13 PM
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Re: How could Mars have once had oceans? It has 37% mass of Earth..
Well Done
gnfr (OP)
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01/27/2021 09:15 PM
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Re: How could Mars have once had oceans? It has 37% mass of Earth..
Thanks fellas. I knew I could count on you
gnfr (OP)
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01/27/2021 09:53 PM
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Re: How could Mars have once had oceans? It has 37% mass of Earth..
Really? Someone must rebut
Anonymous Coward
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01/27/2021 09:54 PM
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Re: How could Mars have once had oceans? It has 37% mass of Earth..
Gravity doesn't change as you increase your elevation.
Anonymous Coward
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01/27/2021 09:54 PM
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Re: How could Mars have once had oceans? It has 37% mass of Earth..
Gravity doesn't change as you increase your elevation.
Bloody Peasant!

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01/27/2021 09:57 PM
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Re: How could Mars have once had oceans? It has 37% mass of Earth..
Flat Mars society
This business will get out of control. It will get out of control and we'll be lucky to live through it.

-Admiral Josh Painter

The past was alterable. The past never had been altered. Oceania was at war with Eastasia. Oceania had always been at war with Eastasia.

-Orwell

Bloody Peasant
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01/27/2021 10:00 PM
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Re: How could Mars have once had oceans? It has 37% mass of Earth..
Gravity doesn't change as you increase your elevation.
 Quoting: Anonymous Coward 77863298


Wut
This business will get out of control. It will get out of control and we'll be lucky to live through it.

-Admiral Josh Painter

The past was alterable. The past never had been altered. Oceania was at war with Eastasia. Oceania had always been at war with Eastasia.

-Orwell

Bloody Peasant
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01/27/2021 10:00 PM
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Re: How could Mars have once had oceans? It has 37% mass of Earth..
Gravity doesn't change as you increase your elevation.
 Quoting: Anonymous Coward 77863298


But atmospheric pressure would change with less mass to hold it...which is what he is referring to.

Also...its flat.
tamarack
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01/27/2021 10:01 PM
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Re: How could Mars have once had oceans? It has 37% mass of Earth..
Jupiter's moon Europa has an ocean.

[link to solarsystem.nasa.gov (secure)]
"Scientists are almost certain that hidden beneath the icy surface of Europa is a salty-water ocean thought to contain twice as much water as Earth’s oceans combined."
Anonymous Coward
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01/27/2021 10:05 PM
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Re: How could Mars have once had oceans? It has 37% mass of Earth..
Gravity doesn't change as you increase your elevation.
 Quoting: Anonymous Coward 77863298


But atmospheric pressure would change with less mass to hold it...which is what he is referring to.

Also...its flat.
 Quoting: Anonymous Coward 77704449


I know what he was referring to, but what he said was it was caused by gravity.

Gravity is a universal constant, which we try to measure with mass -- mass does not create it.

Thus changing your relative position to a mass-ive object does not change gravity.
Anonymous Coward
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01/27/2021 10:07 PM
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Re: How could Mars have once had oceans? It has 37% mass of Earth..
Just reading about new NASA Mars rover and all its new capabilities. Higher speed travel, microphones and HD cameras to document the entire landing. Etc... They are landing in an area believed to possibly be rich in ancient life.. then it occurred to me.

How could Mars have ever had an atmosphere that had oceans and, presumably life, when it has 37% the mass of the Earth? Throwing OUT the fact Mars is 34 million miles further away from the Sun, The density of our atmosphere is dictated by the gravity of the Earth. Presuming the star at the center of our solar system is amenable to allowing a couple of circling rocks to attract an atmosphere, the planets mass, mathematically, dictates how much "atmosphere" it can 'retain.

Even with a more 'friendly' Sun, how could Mars have retained ANY kind of atmospheric density that resembles Earth, with oceans, with only 37% the mass of the Earth?

On Earth at 7,500 feet of altitude, water boils at a 198° and evaporates faster.. thats our gravity, a mile and quarter away from from sea-level.
 Quoting: gnfr 78571889


I haz the dumb
Jungleboogie

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01/27/2021 10:08 PM
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Re: How could Mars have once had oceans? It has 37% mass of Earth..
How could Mars have ever had an atmosphere that had oceans and, presumably life, when it has 37% the mass of the Earth? Throwing OUT the fact Mars is 34 million miles further away from the Sun, The density of our atmosphere is dictated by the gravity of the Earth. Presuming the star at the center of our solar system is amenable to allowing a couple of circling rocks to attract an atmosphere, the planets mass, mathematically, dictates how much "atmosphere" it can 'retain.

 Quoting: gnfr 78571889


Venus also has far less mass than Earth, Sherlock.
Yet it has a much denser atmosphere.

Another example: Pluto, Mercury & Triton have virtually no atmosphere and yet Io has a significant atmosphere.

Best pick up a few more shifts at Walmart and leave the heavy thinking to others.

Look at the bright side, if you work hard enough, you could make shift supervisor one day. Now wouldn't that be something!
Embrace the cognitive dissonance.
Bloody Peasant!

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01/27/2021 10:14 PM
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Re: How could Mars have once had oceans? It has 37% mass of Earth..
Gravity doesn't change as you increase your elevation.
 Quoting: Anonymous Coward 77863298


But atmospheric pressure would change with less mass to hold it...which is what he is referring to.

Also...its flat.
 Quoting: Anonymous Coward 77704449


I know what he was referring to, but what he said was it was caused by gravity.

Gravity is a universal constant, which we try to measure with mass -- mass does not create it.

Thus changing your relative position to a mass-ive object does not change gravity.
 Quoting: Anonymous Coward 77863298


Without mass there is no gravity. Do you have a mathematical explanation how you can calculate gravity without mass? Using the math i understand, you can calculate the force of gravity just by knowing mass and distance.
This business will get out of control. It will get out of control and we'll be lucky to live through it.

-Admiral Josh Painter

The past was alterable. The past never had been altered. Oceania was at war with Eastasia. Oceania had always been at war with Eastasia.

-Orwell

Bloody Peasant
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01/27/2021 10:32 PM
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Re: How could Mars have once had oceans? It has 37% mass of Earth..
Gravity doesn't change as you increase your elevation.
 Quoting: Anonymous Coward 77863298


Yes it does, it decreases exponentially (r is the distance from the center of the mass). Gravity gets smaller really fast the farther away you are.

g = Gm / r^2
WiscoSteve
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01/27/2021 10:33 PM

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Re: How could Mars have once had oceans? It has 37% mass of Earth..
magic
Agent 99

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01/27/2021 10:34 PM

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Re: How could Mars have once had oceans? It has 37% mass of Earth..
someone posted this last week:

Jungleboogie

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01/27/2021 10:56 PM
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Re: How could Mars have once had oceans? It has 37% mass of Earth..
Just reading about new NASA Mars rover and all its new capabilities. Higher speed travel, microphones and HD cameras to document the entire landing. Etc... They are landing in an area believed to possibly be rich in ancient life.. then it occurred to me.

How could Mars have ever had an atmosphere that had oceans and, presumably life, when it has 37% the mass of the Earth? Throwing OUT the fact Mars is 34 million miles further away from the Sun, The density of our atmosphere is dictated by the gravity of the Earth. Presuming the star at the center of our solar system is amenable to allowing a couple of circling rocks to attract an atmosphere, the planets mass, mathematically, dictates how much "atmosphere" it can 'retain.

Even with a more 'friendly' Sun, how could Mars have retained ANY kind of atmospheric density that resembles Earth, with oceans, with only 37% the mass of the Earth?

On Earth at 7,500 feet of altitude, water boils at a 198° and evaporates faster.. thats our gravity, a mile and quarter away from from sea-level.
 Quoting: gnfr 78571889


I haz the dumb
 Quoting: Anonymous Coward 78321357


snicker
Embrace the cognitive dissonance.





GLP