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NASA Orbiter Finds New Gully Channel on Mars

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23 replies to this topic

#16    GreyEater

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Posted 22 March 2014 - 01:21 PM

Actually Ashyne, high temperatures on Mars can reach 70 degrees. Your science is weak, probably like your Kung-Fu.


#17    taniwha

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Posted 22 March 2014 - 07:19 PM

Based soley on the pace of erosion,  I rank Mars the most boring planet in the solar system.


#18    keithisco

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Posted 22 March 2014 - 11:14 PM

View PostGreyEater, on 22 March 2014 - 01:21 PM, said:

Actually Ashyne, high temperatures on Mars can reach 70 degrees. Your science is weak, probably like your Kung-Fu.

For a "newbie" to launch into ad hominem attacks is very poor form. It is poor form for anyone to do so and your comment doesnothing to suggest that your "science" is strong. Back to the thread: water ice tends to sublimate at the surface of the planet due to the extremely low air pressure (rel. to earth)


#19    DONTEATUS

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Posted 22 March 2014 - 11:51 PM

Looks like a great place to poke around ?

This is a Work in Progress!

#20    qxcontinuum

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Posted 23 March 2014 - 05:29 AM

View PostGreyEater, on 22 March 2014 - 01:21 PM, said:

Actually Ashyne, high temperatures on Mars can reach 70 degrees. Your science is weak, probably like your Kung-Fu.

Withouth the kung fu part i would say exactly to the point, thank you ! So why not water torrents coming out from underground again?
A while ago nasa has released a picture of gullies showing water reversing in cascades over a crest...

Edited by qxcontinuum, 23 March 2014 - 05:36 AM.


#21    6.6.6

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Posted 23 March 2014 - 05:42 PM

View PostGreyEater, on 22 March 2014 - 01:21 PM, said:

Actually Ashyne, high temperatures on Mars can reach 70 degrees. Your science is weak, probably like your Kung-Fu.

I'm all for light humour but this is verging on racist


#22    Waspie_Dwarf

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Posted 24 March 2014 - 12:52 AM

View PostGreyEater, on 22 March 2014 - 01:21 PM, said:

Actually Ashyne, high temperatures on Mars can reach 70 degrees. Your science is weak, probably like your Kung-Fu.
Cut out the personal attacks.

"Space is big. Really big. You just won't believe how vastly, hugely, mind-boggingly big it is. I mean, you may think it's a long way down the street to the chemist, but that's just peanuts to space." - The Hitch-Hikers Guide to the Galaxy - Douglas Adams 1952 - 2001

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#23    Waspie_Dwarf

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Posted 24 March 2014 - 01:07 AM

View Postqxcontinuum, on 23 March 2014 - 05:29 AM, said:

Withouth the kung fu part i would say exactly to the point, thank you ! So why not water torrents coming out from underground again?

Read what Keithisco has to say. If you don't get what he means by "sublimation" here is a brief explanation:

Pure water can not exist on the surface of Mars due the low atmospheric pressure. The phase of a substance (whether is is solid, liquid or gas) depends not only on temperature but pressure as well.

Sublimation means that a substance goes directly from the solid phase to the gaseous phase without passing through the liquid phase.

On Earth an example of sublimation is carbon dioxide which sublime from the solid (dry ice) to the gaseous. On Mars water behaves in the same way.


View Postqxcontinuum, on 23 March 2014 - 05:29 AM, said:

A while ago nasa has released a picture of gullies showing water reversing in cascades over a crest...
There is some evidence that highly concentrated brine (VERY salty water) can exist briefly in liquid form on the surface, however this is so full of minerals that it can barely be described as water.
There is ample evidence of the action of large quantities of water millions of years ago, before Mars lost it's atmosphere.
There are no images showing the results of "cascades of water" in the last few million years because open bodies of water are now impossible on the surface of Mars.

No cover up, no conspiracy just very, VERY basic science.

"Space is big. Really big. You just won't believe how vastly, hugely, mind-boggingly big it is. I mean, you may think it's a long way down the street to the chemist, but that's just peanuts to space." - The Hitch-Hikers Guide to the Galaxy - Douglas Adams 1952 - 2001

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#24    Jyre Cayce

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Posted 26 March 2014 - 06:50 AM

I'm sensing some hostility.






Also tagged with mars, mars reconnaissance orbiter, mro, hirise, nasa

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