"It is possible that life on earth arrived from a asteroid that contained small bacteria or something similar?"
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Seminar Detail
Plasma/Upper Amtospheric Interactions Within the Saturn/Titan System
Presenter: Robert M. Winglee
October 23, 2007 02:30 PM Pacific
Titan is the only moon in the solar system that is able to maintain a thick atmosphere, with possible oceans of methane and ethane on its surface. This environment is probably the closest facsimile to the early atmosphere on the Earth, albeit at very much lower temperatures. The upper atmosphere is subject to ionization and erosion from incident plasma that is rotating within Saturn's magnetosphere. This interaction can lead to modifications of the optical emissions that is different from the planetary emissions and thereby allow remote sensing of its upper atmospheric conditions.
3-D simulations are used to quantify how the interaction between Titan and Saturn changes under variable solar wind conditions. It is shown that this interaction leads to the generation of a comet-like tail which can extend several Saturn radii in length. This tail can be subject to disruption during storm-like conditions within the planetary magnetosphere. Potential applications to other systems are discussed, including the Jovian system and extrasolar planets.Participation Instructions
With a Polycom....RSVP to Marco Boldt (Marco.Boldt@nasa.gov) and connect to WebEx as instructed below. If you need Polycom help during the live event, message Marco Boldt in WebEx.
The slides from the seminar can be accessed real-time using WebEx at:
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Without a Polycom...There are two ways to participate:
1) You can listen to the seminar on the telephone while viewing the slides in WebEx (see WebEx instructions above). The NASA conference phone number will be displayed when joining the WebEx meeting.
2) You can watch the Realplayer webcast at: http://vanseg-1.arc.nasa.gov/2007/AB071023-01.ram and view the slides in WebEx (see WebEx instructions above) There is a 30 second delay for the webcast, so you will need to control the slides manually using the arrow buttons in WebEx. Questions for the speaker can be posted in the WebEx chat area to be answered at the end of the talk. Do not try to watch the Realplayer webcast at the same time as the Polycom or the phone.December 21, 2007
