Rosetta - Early Orbital Operations at Comet 67P C-G, August 6, 2014 - November 13, 2014 |
Rosetta - Early Orbital Operations at Comet 67P C-G, August 6, 2014 - November 13, 2014 |
Aug 6 2014, 04:53 PM
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#31
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Junior Member Group: Members Posts: 45 Joined: 11-March 05 From: Canada Member No.: 188 |
How to figure out scale in these wonderful images? Here's a cool size comparison with London from the BBC: http://news.bbcimg.co.uk/media/images/7675...a_comet_624.jpg |
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Aug 6 2014, 05:08 PM
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#32
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Member Group: Members Posts: 255 Joined: 28-October 12 Member No.: 6732 |
... But if they can safely land in one of those green spots closer to the neck of the comet, just imagine the spectacular view - not only of the local surface, but of the other half of the comet looming overhead. The cameras of Philae are pointed at the ground, thus - if all goes well - we would not be able to see the grandiose scenery overhead. |
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Aug 6 2014, 05:30 PM
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#33
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Senior Member Group: Members Posts: 2106 Joined: 13-February 10 From: Ontario Member No.: 5221 |
The cameras of Philae are pointed at the ground, thus - if all goes well - we would not be able to see the grandiose scenery overhead. Some are pointed at the ground, but others are horizontal, Huygens style. See https://www.youtube.com/watch?v=k1IFU6kxcD8 |
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Aug 6 2014, 05:43 PM
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#34
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Senior Member Group: Members Posts: 1075 Joined: 21-September 07 From: Québec, Canada Member No.: 3908 |
Some are pointed at the ground, but others are horizontal, Huygens style. See https://www.youtube.com/watch?v=k1IFU6kxcD8 Description of Çiva (Comet nucleus Infrared and Visible Analyzer) here. |
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Aug 6 2014, 06:05 PM
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#35
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Member Group: Members Posts: 109 Joined: 25-November 04 From: Dublin, Ireland Member No.: 113 |
I can't agree with the BBC graphic. The base unit is 4x2 km, while their graphic conflates the head into the scene. I am at Frankfurt Airport, so can't cut and paste. But Hal Weaver's Slide 51 refers. I have been at every Voyager encounter and more besides. This rocks!
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Aug 6 2014, 06:14 PM
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#36
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Member Group: Members Posts: 102 Joined: 29-January 10 From: Poland Member No.: 5205 |
And here is cross-eye version of the same stereo image: This is fantastic 3D picture! Great work! I love it. -------------------- Adam Hurcewicz from Poland
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Aug 6 2014, 06:15 PM
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#37
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Newbie Group: Members Posts: 14 Joined: 7-January 13 Member No.: 6832 |
I have not seen much discussion on the probability that a stray particle emitted from the Comet could damage either the orbiter or lander.
Are there any papers or information on this possibility? As the Comet continues to increase activity as it approaches perihelion I would think the probability of this happening will go up. I assume they will try to avoid the areas on the Comet with active venting for both the Orbiter and Lander although the Orbiter probably can't stay away from the active areas all the time, and the active areas should evolve with time as we approach perihelion. |
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Aug 6 2014, 07:21 PM
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#38
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Member Group: Members Posts: 796 Joined: 27-February 08 From: Heart of Europe Member No.: 4057 |
Brilliant Machi, and very useful - thanks! This is fantastic 3D picture! Great work! I love it. You're welcome! -------------------- |
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Aug 6 2014, 07:33 PM
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#39
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Member Group: Members Posts: 401 Joined: 5-January 07 From: Manchester England Member No.: 1563 |
Maybe the neck jets represent the sublimation of superficial ice that collected in cold sinks at the end of the comet's last pass rather than indicating a deep structure of ice in the neck. Do the zones of most emission roughly coincide with those that receive the least sunlight? -------------------- |
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Aug 6 2014, 08:10 PM
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#40
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Member Group: Members Posts: 334 Joined: 11-December 12 From: The home of Corby Crater (Corby-England) Member No.: 6783 |
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Aug 6 2014, 08:54 PM
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#41
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Solar System Cartographer Group: Members Posts: 10227 Joined: 5-April 05 From: Canada Member No.: 227 |
Well... yes, I think it probably is!
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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Aug 6 2014, 09:01 PM
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#42
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Member Group: Members Posts: 796 Joined: 27-February 08 From: Heart of Europe Member No.: 4057 |
-------------------- |
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Aug 6 2014, 09:12 PM
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#43
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Junior Member Group: Members Posts: 88 Joined: 8-May 14 Member No.: 7185 |
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Aug 6 2014, 09:12 PM
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#44
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Member Group: Members Posts: 334 Joined: 11-December 12 From: The home of Corby Crater (Corby-England) Member No.: 6783 |
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Aug 6 2014, 09:44 PM
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#45
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Member Group: Members Posts: 334 Joined: 11-December 12 From: The home of Corby Crater (Corby-England) Member No.: 6783 |
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