Mars elevation

[liquidspace2k]

How do they determine the elevation on Mars, on Earth they reference it to the Sea Level, but on Mars there is no Sea Level... do reference to the lowest point on Mars, or to what the average elevation is on Mars. or is there some other way they do it....

 

[Leovinus]

My guess is that there is a ton of flat land that is generally the same height. From this, volcanos and mountains stick up and canyons cut down. That's how I'd do it. <div class="Discussion_UserSignature"> </div>

 

[Saiph]

ahh, the triple point.<br /><br />Look, its liquid, it's solid, no! It's a gas! <div class="Discussion_UserSignature"> <p align="center"><font color="#c0c0c0"><br /></font></p><p align="center"><font color="#999999"><em><font size="1">--------</font></em></font><font color="#999999"><em><font size="1">--------</font></em></font><font color="#999999"><em><font size="1">----</font></em></font><font color="#666699">SaiphMOD@gmail.com </font><font color="#999999"><em><font size="1">-------------------</font></em></font></p><p><font color="#999999"><em><font size="1">"This is my Timey Wimey Detector.  Goes "bing" when there's stuff.  It also fries eggs at 30 paces, wether you want it to or not actually.  I've learned to stay away from hens: It's not pretty when they blow" -- </font></em></font><font size="1" color="#999999">The Tenth Doctor, "Blink"</font></p> </div>

 

[Saiph]

<i>at</i> the triple point it's doing all three, or easily varied...it's just a fun spot. <div class="Discussion_UserSignature"> <p align="center"><font color="#c0c0c0"><br /></font></p><p align="center"><font color="#999999"><em><font size="1">--------</font></em></font><font color="#999999"><em><font size="1">--------</font></em></font><font color="#999999"><em><font size="1">----</font></em></font><font color="#666699">SaiphMOD@gmail.com </font><font color="#999999"><em><font size="1">-------------------</font></em></font></p><p><font color="#999999"><em><font size="1">"This is my Timey Wimey Detector.  Goes "bing" when there's stuff.  It also fries eggs at 30 paces, wether you want it to or not actually.  I've learned to stay away from hens: It's not pretty when they blow" -- </font></em></font><font size="1" color="#999999">The Tenth Doctor, "Blink"</font></p> </div>

 

[CalliArcale]

I had a whacky chemistry professor (who tended to try experiments publicly before ever trying them privately) who let us see the triple point of carbon dioxide. He "borrowed" a disposable eyedropper from the biology department, packed it with dry ice, pinched the tip shut with a pair of pliers, and then held it over the overhead projector. Its sillouhette was cast on the wall, and the heat from the light bulb accelerated the process. The eyedropped held up well; it provided enough pressure that we actually saw liquid carbon dioxide. It didn't pop, either -- the professor lost his grip on the pliers and the eyedropper went shooting off across the room like a tiny rocket. Fortunately, it didn't hit anyone....<br /><br />(He also tried inhaling argon to make his voice lower. In front of elementary school students. Without testing it first. The argon displaced all the oxygen in his lungs and he passed out before he could try talking. <img src="/images/icons/tongue.gif" /> ) <div class="Discussion_UserSignature"> <p> </p><p><font color="#666699"><em>"People assume that time is a strict progression of cause to effect, but actually from a non-linear, non-subjective viewpoint it's more like a big ball of wibbly wobbly . . . timey wimey . . . stuff."</em>  -- The Tenth Doctor, "Blink"</font></p> </div>