Talk:Hellas Planitia

message: Utopia Planitia is listed as the "largest recognized impact basin on Mars and in the Solar System with an estimated diameter of 3300 km" Utopia_Planitia.  But Hellas is "the largest unambiguous impact structure on the planet" and listed as 2,300 km wide. ...So, which is it?  
If both of these are true, and it's because of some technical difference in a 'basin' and 'structure' that should be clarified.  And if that's the case, I feel like this might need some rewriting, since the size of the 'structure'/'basin' is directly compared to 'crater' a few words later.
76.22.65.76 (talk) 19:55, 18 January 2015 (UTC)
thread_title:  Hellas or Utopia is larger? 

message: I don't think this part is correct:
:and above the triple point of water, suggesting that the liquid phase would be transient (would evaporate over time) if the temperature would rise above 0 °C (32 °F).[7]
the implication of the pressure being above the triple point of water is that liquid water can actually exist, that is, there is a range of temperatures within which water is liquid. It's not a very big range, maybe 10 degrees C (because the pressure isn't very much above the triple point), but this compares with most of the rest of the surface of Mars, for which the pressure is below the triple point (about 0.6 kPa). In the latter case, there is no temperature at which water will exist in equilibrium in the liquid phase.
DuncanKitchin (talk) 05:27, 13 April 2009 (UTC)
replies: text: Oh how convenient.  The resolution of the basin in Google Earth (Mars) is lower then the surrounding terrain.98.165.6.225 (talk) 15:14, 3 June 2009 (UTC)
thread_title:  Atmospheric Pressure 

message: How come that, according to the image in the article, Hellas Planitia is entirely red, yet in Google Mars it is white in color. I think, giving to the natural "color" of ice, the colors in the image provided are simply false. Please, replace it with the right one. 62.33.188.17 (talk) 21:52, 7 September 2009 (UTC)
thread_title:  Red cr*p 

message: The depth of the crater (7,152 m (23,465 ft)[1] ( 7,000 m (23,000 ft)) below the standard topographic datum of Mars) explains
The 7152m are measured from the standard topographic datum, aren't they? And it would be better to correctly name this the lowest point in the crater. Much more meaningful than this record number would however be an average depth.  --Maxus96 (talk) 17:20, 26 November 2016 (UTC)
thread_title:  depth 

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thread_title:  External links modified