GRAIL: New DISCOVERY mission to the moon |
GRAIL: New DISCOVERY mission to the moon |
Jan 11 2013, 05:50 PM
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#91
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Member Group: Members Posts: 115 Joined: 8-January 05 From: Austin | Texas Member No.: 138 |
Final (or nearly final, not sure yet) video from GRAIL, three days before impact: http://www.jpl.nasa.gov/video/index.php?id=1181 Phil Is it too late to send a message to Grail telling it to turn it's phone horizontal? |
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Jan 11 2013, 07:00 PM
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#92
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Founder Group: Chairman Posts: 14434 Joined: 8-February 04 Member No.: 1 |
The cameras were bolted to the spacecraft in that orientation probably about two years ago - and now lay smashed on the lunar surface.
I'm going to say yes...it's a bit too late. |
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Jan 11 2013, 07:53 PM
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#93
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Member Group: Members Posts: 115 Joined: 8-January 05 From: Austin | Texas Member No.: 138 |
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Jan 17 2013, 03:13 PM
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#94
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Solar System Cartographer Group: Members Posts: 10229 Joined: 5-April 05 From: Canada Member No.: 227 |
-------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Jan 17 2013, 04:23 PM
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#95
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Is this farside map of yours still current? Trying to make sure I have a matched set
-------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Jan 17 2013, 05:25 PM
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#96
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Solar System Cartographer Group: Members Posts: 10229 Joined: 5-April 05 From: Canada Member No.: 227 |
Yes it is - no more farside impacts. Incidentally, Chandrayaan-1 was predicted to impact in 2012 as its orbit evolved, but as it was not tracked or trackable we don't know where it fell.
Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Mar 19 2013, 10:47 PM
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#97
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Junior Member Group: Members Posts: 59 Joined: 25-December 05 From: Stevens Point, Wisconsin, USA Member No.: 619 |
LROC spots craters formed by GRAIL probes (sorry I couldn't find the original paper in the conference abstracts):
http://science.nbcnews.com/_news/2013/03/1...oon-probes?lite |
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Mar 19 2013, 10:55 PM
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#98
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Merciless Robot Group: Admin Posts: 8785 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Wow. LROC is an impressive instrument indeed, and their science team is getting very good at this sort of thing. Well done!!!
-------------------- 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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Mar 20 2013, 03:42 AM
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#99
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Solar System Cartographer Group: Members Posts: 10229 Joined: 5-April 05 From: Canada Member No.: 227 |
There is no abstract, this was a press conference, not a paper. It's cool to see this even with LRO in its higher orbit.
Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Mar 21 2013, 09:46 PM
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#100
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Senior Member Group: Members Posts: 3008 Joined: 30-October 04 Member No.: 105 |
Better images and text at the NASA/LROC site:
http://www.nasa.gov/mission_pages/LRO/news...il-results.html -------------------- |
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Apr 3 2013, 02:11 PM
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#101
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Solar System Cartographer Group: Members Posts: 10229 Joined: 5-April 05 From: Canada Member No.: 227 |
How accurate were the pre-impact predictions?
Here is an overlay of the pre-impact prediction on the new topo map showing the actual impact crater locations. B was nearly 1000 m off its prediction, A only about 600 m. Not bad! Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Oct 6 2014, 07:55 AM
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#102
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Member Group: Members Posts: 238 Joined: 15-January 13 Member No.: 6842 |
GRAIL's gravity map has revealed a "hidden valley system", acording to the BBC article and the paper published in Nature. QUOTE Scientists have identified a huge rectangular feature on the Moon that is buried just below the surface. The 2,500km-wide structure is believed to be the remains of old rift valleys that later became filled with lava. Centred on the Moon's Procellarum region, the feature is really only evident in gravity maps acquired by Nasa's Grail mission in 2012. But knowing now of its existence, it is possible to trace the giant rectangle's subtle outline even in ordinary photos. Mare Frigoris, for example, a long-recognised dark stripe on the lunar surface, is evidently an edge to the ancient rift system. "It's really amazing how big this feature is," says Prof Jeffery Andrews-Hanna. "It covers about 17% of the surface of the Moon. And if you think about that in terms relative to the size of the Earth, it covers an area equivalent to North America, Europe and Asia combined," the Colorado School of Mines scientist told BBC News. "When we first saw it in the Grail data, we were struck by how big it was, how clear it was, but also by how unexpected it was. "No-one ever thought you'd see a square or a rectangle on this scale on any planet." What are your thoughts on the possible causes of its formation? The article mentions heating from radioactive decay, and subsequent cooling, but could this have been possibly caused by the giant impacts that created the maria on the near side? [Edit] NASA article. -------------------- Curiosity rover panoramas: http://www.facebook.com/CuriosityRoverPanoramas
My Photosynth panoramas: http://photosynth.net/userprofilepage.aspx...;content=Synths |
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Oct 6 2014, 01:54 PM
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#103
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Solar System Cartographer Group: Members Posts: 10229 Joined: 5-April 05 From: Canada Member No.: 227 |
The giant impacts did not create the maria. They created the big craters (basins) which contain some of the maria. The maria, the lava flows, are anywhere from 400 to 2000 million years later than the impacts, as shown by sample dating. Since GRAIL's linear features do not follow the pattern of big impact basins either concentrically or radially, they are most likely not related to the impacts.
Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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