File:PIA19059-SaturnMoon-Enceladus-OceanMethane-20150311.png
Original file (4,820 × 3,906 pixels, file size: 7.6 MB, MIME type: image/png)
Captions
Summary
[edit]DescriptionPIA19059-SaturnMoon-Enceladus-OceanMethane-20150311.png |
English: PIA19059: Trapping of Methane In Enceladus' Ocean
http://photojournal.jpl.nasa.gov/catalog/PIA19059 This illustration depicts potential origins of methane found in the plume of gas and ice particles that sprays from Saturn's moon, Enceladus, based on research by scientists working with the Ion and Neutral Mass Spectrometer on NASA's Cassini mission. Scientists believe the plumes originate from an internal liquid-water ocean beneath the moon's south polar region. Recent findings from Cassini suggest hydrothermal activity as one of two likely sources of methane in the plume of gas and ice particles that erupts from the south polar region of Enceladus. The finding is the result of extensive modeling to address why methane, as previously sampled by Cassini, is curiously abundant in the plume. Researchers with Cassini's Ion and Neutral Mass Spectrometer (INMS) determined that, at the high pressures expected in the moon's ocean, icy materials called clathrates could form that imprison methane molecules within a crystal structure of water ice. Their models indicated that this process could be so efficient at depleting methane from Enceladus' ocean that they still needed an explanation for the methane abundance in the plume. In one scenario, hydrothermal processes supersaturate the ocean with methane. This could occur if methane is produced faster than it is converted into clathrates. A second possibility is that methane clathrates from the ocean are dragged along into the erupting plumes and release their methane as they rise, like bubbles forming in a popped bottle of champagne. The authors agree that both scenarios are likely occurring to some degree, but they note that the presence of nanosilica grains, as documented by Cassini's Cosmic Dust Analyzer (CDA) instrument, favors the hydrothermal scenario. The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington. The Cassini CDA instrument was provided by the German Aerospace Center; the instrument team, led by Ralf Srama, is based at the University of Stuttgart in Germany. The INMS team is based at Southwest Research Institute, San Antonio, Texas. For more information about the Cassini-Huygens mission visit http://saturn.jpl.nasa.gov and http://www.nasa.gov/cassini. |
|||||
Date | ||||||
Source | http://photojournal.jpl.nasa.gov/jpeg/PIA19059.jpg | |||||
Author | NASA/JPL-Caltech/SwRI | |||||
Other versions |
|
Licensing
[edit]Public domainPublic domainfalsefalse |
This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) | ||
Warnings:
|
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 12:55, 12 March 2015 | 4,820 × 3,906 (7.6 MB) | Drbogdan (talk | contribs) | User created page with UploadWizard |
You cannot overwrite this file.
File usage on Commons
The following page uses this file:
File usage on other wikis
The following other wikis use this file:
- Usage on bn.wikipedia.org
- Usage on cs.wikipedia.org
- Usage on de.wikipedia.org
- Usage on el.wikipedia.org
- Usage on en.wikipedia.org
- Usage on es.wikipedia.org
- Usage on fa.wikipedia.org
- Usage on fr.wikipedia.org
- Usage on gl.wikipedia.org
- Usage on hy.wikipedia.org
- Usage on id.wikipedia.org
- Usage on it.wikipedia.org
- Usage on lb.wikipedia.org
- Usage on pt.wikipedia.org
- Usage on ro.wikipedia.org
- Usage on uz.wikipedia.org
- Usage on www.wikidata.org
- Usage on zh.wikipedia.org