Cassini's Extended-Extended Mission, July 2010-June 2017 |
Cassini's Extended-Extended Mission, July 2010-June 2017 |
Feb 6 2009, 03:35 AM
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Senior Member Group: Moderator Posts: 3241 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Perhaps now would be a good time to start a new thread on the Extended-Extended Mission.
http://www.space.com/news/090127-cassini-m...-extension.html -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Feb 26 2009, 06:28 PM
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Rover Driver Group: Members Posts: 1015 Joined: 4-March 04 Member No.: 47 |
Great write-up!
In the (pretty) graphic representation of the mission Emily posted today on her blog it mentions G Arc flybys, one of them taking place next year. What are the observations like for these? |
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Feb 27 2009, 02:17 PM
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Member Group: Members Posts: 237 Joined: 22-December 07 From: Alice Springs, N.T. Australia Member No.: 3989 |
G Arc flybys ..... What are the observations like for these? If you mean why are these observations being made then ...........The G arc is part of the G ring - a faint ring about mid way between the F and E rings. There is a bright bulge or arc for about a sixth of the ring circumference that is held in place by an orbital resonance with Mimas. I think the interest in studying this is that the properties of the arc strongly suggest that it is the remnants of a small icy moon (small = about 250m diameter) that broke up quite recently in astronomical terms (maybe a few hundred thousand years ago?). So obs from a close range will give us more information on its dynamical properties, size of constituents etc as a step forward in understanding how the rings of Saturn may have formed. If you mean what observations are to be made, then I don't know! Good that the mission is not to be extended for too long - the G ring is expected to dissipate within the blink of an astronomical eye - a few thousand years! |
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