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Chang'e 5 sample return mission
kenny
post Dec 16 2020, 06:54 PM
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Capsule landed in one piece, and recovery teams have arrived .
Many congratulations to China on the completion of an extraordinarily complex mission....



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nprev
post Dec 16 2020, 08:02 PM
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Incredible technical achievement (several, in fact), and major congratulations to them!

Thanks for the updates, Kenny! smile.gif


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Hungry4info
post Dec 16 2020, 10:12 PM
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On this forum on 24 Oct 2007, user ustrax posted the following comment shortly after Chang'e 1 entered lunar orbit:

QUOTE
Why do I have this funny feeling that this is just the beginning of something extraordinary?... smile.gif


Well here we are. First lunar sample return since 1976. Huge congratulations to the People's Republic.


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JRehling
post Dec 16 2020, 10:28 PM
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Congratulations to the team.

I have had an ongoing quest to photograph Mons Rümker in good detail, which makes this mission a bit more relatable in a personal sense.

I have read conflicting things about whether or not samples collected by Apollo have remained pristine since their collection. In the one case, this new sample may represent an opportunity for truly original science regardless of the collection site. In any case, it's a remarkable technical achievement.
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Bill Harris
post Dec 17 2020, 04:13 AM
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The Apollo samples were specifically targeted to be the oldest rocks. These new samples are younger, perhaps 1 billion years.

The next samples from the South Polar region are looking for water, which is the newest Lunar quest.

--Bill


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Phil Stooke
post Dec 17 2020, 11:00 PM
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Sorry, Bill, but I must take issue with your assertion that Apollo samples were targeted to be the oldest rocks. Only for Apollos 16 and 17 was there a desire to sample pre-Imbrian rocks (as well as an expectation of young volcanics at Taurus-Littrow which didn't happen as expected).

Apollo 11 was not targeted for any particular age of material, just the smoothest spot. Apollo 12 was then targeted for a younger mare unit as well as its pinpoint target, Surveyor 3. Next Apollos 14 and 15 were targeted at ejecta and massifs of the Imbrium basin to establish its age. Then those last two missions came in looking for older highlands and a pre-Imbrian (i.e Nectarian) basin rim. So really there was quite a mix of targets. Don Wilhelms' book To a Rocky Moon gives an excellent description of the site selection and geological planning. He was disappointed that Apollo 12 went to Surveyor 3 rather than Surveyor 1, which would have been a still younger mare surface, but the Copernicus ray at Surveyor 3 tipped the balance (plus better backup site options).

Undeniably, though, these new samples from Chang'e 5 will be of enormous value and significantly different from anything we had before.

Phil


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Marcin600
post Dec 18 2020, 05:07 AM
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Coming back to sampling on the Moon: here is a fragment of XinhuaVideo - the moment of digging (quite clearly visible)

Edit: and the next stage of digging - right next to the first trench (from another video, with slightly better quality)
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Attached File  digging.mp4 ( 530.72K ) Number of downloads: 426
Attached File  digging_2.mp4 ( 461.76K ) Number of downloads: 343
 
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Phil Stooke
post Dec 18 2020, 07:40 AM
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Very nice! These two operations are what I showed as 1 and 2 in that picture I posted earlier with 6 stages of sampling. But looking at this carefully, if you compare the end of video 1 with the start of video 2, there's been some action between them. That was presumably the second sampling device which is pushed into the regolith to scoop it up. Somewhere I saw that there had been 13 sampling events (15 planned but the last 2 not needed).

Phil


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Marcin600
post Dec 19 2020, 10:57 PM
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from Chinese TV: capsule landing
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Marcin600
post Dec 19 2020, 10:59 PM
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deployment of the parachute
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Marcin600
post Dec 19 2020, 11:06 PM
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entry of the capsule into the atmosphere
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Marcin600
post Dec 19 2020, 11:12 PM
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docking in orbit around the Moon
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Attached File  docking_2.mp4 ( 1.07MB ) Number of downloads: 287
 
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Marcin600
post Dec 19 2020, 11:14 PM
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docking 3
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Marcin600
post Dec 19 2020, 11:15 PM
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sample transfer

I had not seen this interesting moment of "stuffing" samples in several steps before
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Marcin600
post Dec 19 2020, 11:16 PM
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separation
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