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MESSENGER ARRIVES, Mercury Orbit Insertion
Phil Stooke
post Apr 1 2011, 01:56 PM
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"Is that an ancient lava 'riverbed'?"

No! It's a secondary crater chain - look at the so-called Rima Stadius I on the Moon for a comparison (it's not called that any more) - just NE of Copernicus.

Phil


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... because the Solar System ain't gonna map itself.
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Phil Stooke
post Apr 1 2011, 04:18 PM
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More pictures up...

Phil


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zeBeamer
post Apr 1 2011, 08:57 PM
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new and unexpected images from MESSENGER arrived today !
http://messenger.jhuapl.edu/gallery/scienc...mp;image_id=448

Erwan
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tanjent
post Apr 1 2011, 09:33 PM
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Dang, I still can't access jhuapl and a number of other U.S. sites from here in Taiwan. Does anyone else have a similar problem? The Cassini site is also inaccessible to me most of the time recently. I complained to my ISP and they actually blamed it on the Japan earthquake - but tracert indicates the problem is somewhere in the U.S. I thought the Internet was designed to be robust in the face of point blockages whatever the cause. Anyway I hope there will be plenty of secondary renderings springing up on this thread and elsewhere, before the "oohs" and "aahs" drive me nuts! Thanks Hugh, for your offering in 93 - spectacular.
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stevesliva
post Apr 1 2011, 10:00 PM
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You can always try a proxy. Sometimes intermediate DNS caching screws you. For awhile I couldn't access my college's domain from my employer's network. Sending a few emails went nowhere on that one, too.
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nprev
post Apr 2 2011, 01:37 AM
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QUOTE (zeBeamer @ Apr 1 2011, 12:57 PM) *
new and unexpected images from MESSENGER arrived today !
http://messenger.jhuapl.edu/gallery/scienc...mp;image_id=448



laugh.gif laugh.gif laugh.gif ...Apr 1 is ALWAYS an entertaining day on Earth!


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A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Ron Hobbs
post Apr 2 2011, 04:54 PM
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QUOTE (zeBeamer @ Apr 1 2011, 01:57 PM) *
new and unexpected images from MESSENGER arrived today !


SuhWEET!
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maschnitz
post Apr 4 2011, 05:52 AM
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This may be an odd question. Maybe I've misunderstood the science here. But is MESSENGER expected to markedly improved the ephemerides of Mercury and other solar system bodies?

Something I've been interested in (very casually! not a scientist!) is the accuracy of our knowledge of the planet's positions, and how folks use them to make statements about orbital stability and solar system masses and stuff like that. (eg. this PDF)

Is this supposed to be no improvement, a minor improvement, or a major improvement? Are there any specific results expected or hoped for?
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Phil Stooke
post Apr 4 2011, 02:26 PM
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Ranging and Doppler might make some improvements to the orbit data, and the rotation axis orientation, though maybe not much improvement over what radar has already given us. Other bodies? - I can't see that. The questions you are interested in are probably addressed most thoroughly with radar, at least out to Saturn's orbit. Goldstone and Arecibo routinely do radar ranging and doppler for solar system targets.

Phil

(PS - new pics up again!)


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Astro0
post Apr 4 2011, 11:37 PM
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In the latest release they show a three image set that is said to help "test their ability to mosaic" but they didn't do it for the release.
Guess it's up to us then wink.gif smile.gif

Attached Image
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nprev
post Apr 5 2011, 12:23 AM
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Oddly fascinating that, Astro0, yes? wink.gif


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Astro0
post Apr 5 2011, 01:16 AM
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I wish we had more images to play work with. It's going to be hard to wait for the PDS release a few months from now.
Maybe if we wish really hard and click our heals together three times and say:

Attached Image There's no place like Mercury. There's no place like Mercury. There's no place like Mercury! smile.gif
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