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Archivo:PIA19088-MarsCuriosityRover-MethaneSource-20141216.png
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| DescripciónPIA19088-MarsCuriosityRover-MethaneSource-20141216.png |
English: December 16, 2014
http://mars.jpl.nasa.gov/msl/multimedia/images/?ImageID=6891 This illustration portrays possible ways that methane might be added to Mars' atmosphere (sources) and removed from the atmosphere (sinks). NASA's Curiosity Mars rover has detected fluctuations in methane concentration in the atmosphere, implying both types of activity occur in the modern environment of Mars. A molecule of methane consists of one atom of carbon and four atoms of hydrogen. Methane can be generated by microbes and can also be generated by processes that do not require life, such as reactions between water and olivine (or pyroxene) rock. Ultraviolet radiation (UV) can induce reactions that generate methane from other organic chemicals produced by either biological or non-biological processes, such as comet dust falling on Mars. Methane generated underground in the distant or recent past might be stored within lattice-structured methane hydrates called clathrates, and released by the clathrates at a later time, so that methane being released to the atmosphere today might have formed in the past. Winds on Mars can quickly distribute methane coming from any individual source, reducing localized concentration of methane. Methane can be removed from the atmosphere by sunlight-induced reactions (photochemistry). These reactions can oxidize the methane, through intermediary chemicals such as formaldehyde and methanol, into carbon dioxide, the predominant ingredient in Mars' atmosphere. |
| Fecha | |
| Fuente | http://mars.jpl.nasa.gov/msl/images/methane-source-mars-rover-curiosity-pia19088-full.jpg |
| Autor | NASA/JPL-Caltech |
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| This media was created by the Jet Propulsion Laboratory (JPL) at Caltech. Their website states: "Unless otherwise noted, images and video on JPL public web sites (public sites ending with a jpl.nasa.gov address) may be used for any purpose without prior permission, subject to the special cases noted below. Publishers who wish to have authorization may print this page and retain it for their records; JPL does not issue image permissions on an image by image basis." Conditions:
According to JPL's image use policy additional restriction is that no endorsement of any product or service by Caltech, JPL or NASA is claimed or implied. Caltech's disclaimer: Caltech makes no representations or warranties with respect to ownership of copyrights in the images, and does not represent others who may claim to be authors or owners of copyright of any of the images, and makes no warranties as to the quality of the images. Caltech shall not be responsible for any loss or expenses resulting from the use of the images, and you release and hold Caltech harmless from all liability arising from such use. Usage on the English Wikipedia: On the English Wikipedia you can use the {{JPL Image}} template to display the copyright notice. (See Wikipedia:Using JPL images for details)
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| Fecha y hora | Miniatura | Dimensiones | Usuario | Comentario | |
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| actual | 01:18 18 dic 2014 | Sin miniatura | 1440 × 1080 (2,66 MB) | wikimediacommons>Drbogdan | User created page with UploadWizard |
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