Marspedia - User contributions [en]

File:Face.gif

2008-11-29T20:30:34Z

Mars008: The Source

This picture is from:
http://science.nasa.gov/headlines/y2001/ast24may_1.htm

File:Face.gif

2008-11-29T20:29:10Z

Mars008:

The Face on Mars

2008-11-29T20:28:47Z

Mars008: I have add a picture from the face.

'''The face''' is an eroded mesa-like landform in the [[Cydonia]] region.

[[Image:face.gif|thumb|200px|right|image of the legendary face from the Mars]]

== Theories of alien construction ==
Due to the fact that the first few pictures of the face showed a face like structure due to shadows,
Fringe theories have arose that the face (And surrounding mesas) were built by an alien civilization, and that NASA was covering up the evidence. However, this notion is not accepted my prominant Mars scientists, and more detailed photos of the face taken by the HiRISE cameras show that it is just an ordinary landform.

{{stub}}

[[Category:Aerography]]

Gusev Crater

2008-11-29T20:20:56Z

Mars008: I have given the picture a new position in this page.

[[Image:GusevCrater.gif|thumb|200px|right|image of the Gusev Crater]]

The '''Gusev Crater''' was named in 1876 after Russian astronomer Matvei Gusev (1826–1866).<ref>[http://en.wikipedia.org/wiki/Matvei_Gusev Matvey Matveyevich Gusev on Wikipedia]</ref> The crater (created by a large [[meteorite]] impact approximately 3.9 billion years ago during the [[Late Heavy Bombardment]]) is located 175.4°E 14.6°S, just south of the equator. It is 144 km (90 mi) in diameter and provided an ideal landing zone for one of the [[:category:Mars Exploration Rover Mission|MER]] rovers, [[Spirit]].

==An ancient lake?==
The crater exhibits evidence that it once contained substantial quantities of liquid [[water]]. A channel enters the south of the crater. Known as [[Ma'adim Vallis]], this was almost certainly a means for which the crater was supplied with water. On January 9th, 2004, the [[Spirit]] rover landed in the crater and began to analyse the surrounding rock. Expecting to find overwhelming evidence of an ancient lake, mission scientists were disappointed to find very little indication of water.

Although this was unexpected, during the trip to the [[Columbia Hills]], Spirit eventually found evidence that the area had once held a quantity of saltwater.<ref>[http://en.wikipedia.org/wiki/Gusev_Crater Gusev Crater on Wikipedia]</ref><ref>[http://marsrovers.nasa.gov/newsroom/pressreleases/20070521a.html NASA press release, May 21, 2007. Evidence for water in Gusev Crater]</ref>

===References===
<references/>

[[category:regions]]
[[category:geology]]

File:GusevCrater.gif

2008-11-29T20:00:21Z

Mars008:

I found this picture from this address:
http://science.nasa.gov/headlines/y2003/30dec_gusevcrater.htm

File:GusevCrater.gif

2008-11-29T19:57:09Z

Mars008:

Gusev Crater

2008-11-29T19:56:35Z

Mars008: /* An ancient lake? */

The '''Gusev Crater''' was named in 1876 after Russian astronomer Matvei Gusev (1826–1866).<ref>[http://en.wikipedia.org/wiki/Matvei_Gusev Matvey Matveyevich Gusev on Wikipedia]</ref> The crater (created by a large [[meteorite]] impact approximately 3.9 billion years ago during the [[Late Heavy Bombardment]]) is located 175.4°E 14.6°S, just south of the equator. It is 144 km (90 mi) in diameter and provided an ideal landing zone for one of the [[:category:Mars Exploration Rover Mission|MER]] rovers, [[Spirit]].

==An ancient lake?==
The crater exhibits evidence that it once contained substantial quantities of liquid [[water]]. A channel enters the south of the crater. Known as [[Ma'adim Vallis]], this was almost certainly a means for which the crater was supplied with water. On January 9th, 2004, the [[Spirit]] rover landed in the crater and began to analyse the surrounding rock. Expecting to find overwhelming evidence of an ancient lake, mission scientists were disappointed to find very little indication of water.

[[Image:GusevCrater.gif|thumb|200px|right|image of the Gusev Crater]]

Although this was unexpected, during the trip to the [[Columbia Hills]], Spirit eventually found evidence that the area had once held a quantity of saltwater.<ref>[http://en.wikipedia.org/wiki/Gusev_Crater Gusev Crater on Wikipedia]</ref><ref>[http://marsrovers.nasa.gov/newsroom/pressreleases/20070521a.html NASA press release, May 21, 2007. Evidence for water in Gusev Crater]</ref>

===References===
<references/>

[[category:regions]]
[[category:geology]]

Oxygen

2008-11-29T18:25:55Z

Mars008: Undo revision 4025 by 193.86.86.86 (Talk)

{{element
|float=right
|elementName=Oxygen
|elementSymbol=O
|protons=8
|abundance=0.13% ([[atmosphere]])
}}

'''Oxygen''' (''periodic table symbol:'' O<sup>8</sup>) is a chemical element that can be found in the [[atmosphere]] and in several [[minerals]] on [[Mars]].

==Biological significance==
The metabolism of [[human|human beings]], [[:category:animals|animals]] and various [[microbes]] depends on oxygen. The atmosphere of Mars contains only 0.2 % oxygen, which is not enough to support animal or human life.

==Production==
Oxygen can be produced
* in [[greenhouse]]s by plants.
* by reduction of [[carbon dioxide]] from the martian atmosphere
* by reduction of oxide minerals
* by [[electrolysis]] of [[water]]

[[Category: Biospherics]]
[[Category: Greenhouse]]
[[Category: Chemistry]]