Earth Return & Sample Science |
Earth Return & Sample Science |
Oct 11 2023, 04:10 PM
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#151
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Member Group: Members Posts: 437 Joined: 14-December 15 Member No.: 7860 |
The dust collected on the cover weighs approximately 1.5 grams. They haven't weighed the "mylar flap pebbles" yet. The entire sample is still estimated at approximately 250 grams.
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Oct 11 2023, 05:00 PM
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#152
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Member Group: Members Posts: 437 Joined: 14-December 15 Member No.: 7860 |
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Oct 11 2023, 05:11 PM
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#153
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Forum Contributor Group: Members Posts: 1374 Joined: 8-February 04 From: North East Florida, USA. Member No.: 11 |
Literally looks like coal.
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Oct 11 2023, 05:13 PM
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#154
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Senior Member Group: Members Posts: 2105 Joined: 13-February 10 From: Ontario Member No.: 5221 |
Yes, just with tiny little white particles here and there....
One of the panelists noted the fractal appearance compared with the images of Bennu from the surface, and it's very obvious in these stills. |
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Oct 11 2023, 05:34 PM
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#155
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Senior Member Group: Members Posts: 3008 Joined: 30-October 04 Member No.: 105 |
Literally looks like coal. And actually doesn't resemble coal. This is a low-albedo carbonaceous material. --Bill -------------------- |
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Oct 11 2023, 05:38 PM
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#156
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Senior Member Group: Members Posts: 3008 Joined: 30-October 04 Member No.: 105 |
Yes, just with tiny little white particles here and there.... One of the panelists noted the fractal appearance compared with the images of Bennu from the surface, and it's very obvious in these stills. "Fractal appearance". Yes! Accreted (condensed??) from a primordial solar nebula, it does have a random-yet-organized nature. --Bill -------------------- |
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Oct 11 2023, 06:00 PM
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#157
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Member Group: Members Posts: 437 Joined: 14-December 15 Member No.: 7860 |
Dante Lauretta also mentioned 2 types of rocks visible on the surface of Bennu: 1) lighter, smooth, more compact and seem more durable, and 2) darker, rough, "conglomerate" and more brittle, and that these 2 types of rocks can even be seen in this small Bennu sample in the picture - he mentioned that in frame E two pebbles next to each other probably belong to these 2 types of rocks (the numbers in the picture are my addition):
https://www.youtube.com/watch?v=oFvIuSpACQA - 42:53 |
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Oct 11 2023, 08:39 PM
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#158
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Senior Member Group: Members Posts: 2105 Joined: 13-February 10 From: Ontario Member No.: 5221 |
Container will be opened in 2 weeks, according to the telecon:
https://www.youtube.com/watch?v=2asm3j9RV3E |
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Oct 12 2023, 03:05 PM
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#159
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Member Group: Members Posts: 437 Joined: 14-December 15 Member No.: 7860 |
In this NASA Goddard Space Flight Center photo album: https://www.flickr.com/photos/gsfc/, already mentioned on the forum, there is a high resolution picture of dust and small crumbs on the lid around TAGSAM shown during the conference:
https://www.flickr.com/photos/gsfc/53251699726/ Credit: Dante Lauretta CC license: https://creativecommons.org/licenses/by/2.0/ I am attaching some cut out and enlarged Bennu "pebbles". |
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Oct 12 2023, 03:07 PM
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#160
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Member Group: Members Posts: 437 Joined: 14-December 15 Member No.: 7860 |
There is also a small blue particle among the dust from Bennu - it clearly comes from the sampler itself or something put into the glovebox by people. This shows that researchers must carefully separate all "terrestrial artifacts" from this "bonus" Bennu material.
From the same photo: https://www.flickr.com/photos/gsfc/53251699726/ Credit: Dante Lauretta CC license: https://creativecommons.org/licenses/by/2.0/ |
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Oct 12 2023, 03:08 PM
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#161
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Member Group: Members Posts: 437 Joined: 14-December 15 Member No.: 7860 |
Here you can see (I added arrows) how Bennu dust covers various difficult nooks and crannies on the outside of TAGSAM - collecting it all is not easy: https://www.flickr.com/photos/gsfc/53250789352/
Credit: NASA CC license: https://creativecommons.org/licenses/by/2.0/ And here you can see the way they collect dust and pebbles: https://www.flickr.com/photos/gsfc/53250789327/ Credit: NASA CC license: https://creativecommons.org/licenses/by/2.0/ |
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Oct 12 2023, 03:53 PM
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#162
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Member Group: Members Posts: 437 Joined: 14-December 15 Member No.: 7860 |
Here is a bit about the results of preliminary analyzes of the "bonus" material from Bennu.
https://www.nasa.gov/news-release/nasas-ben...s-carbon-water/ Unfortunately, high-resolution pictures of the crumbs from the mylar flap have not been published yet |
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Oct 12 2023, 09:04 PM
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#163
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Senior Member Group: Members Posts: 3008 Joined: 30-October 04 Member No.: 105 |
There is also a small blue particle among the dust from Bennu - it clearly comes from the sampler itself or something put into the glovebox by people. This shows that researchers must carefully separate all "terrestrial artifacts" from this "bonus" Bennu material. From the same photo: https://www.flickr.com/photos/gsfc/53251699726/ Credit: Dante Lauretta CC license: https://creativecommons.org/licenses/by/2.0/ Remember, the Bennu regolith is not "pristine". It is composed of fragments of Bennu as it is being abraded by meteors, fragments of meteors, fragments of asteroids, and fragments of planets and satellites. To get pristine material you would need to clean off an area down to 'bedrock' and collect samples of the undisturbed bedrock. --Bill -------------------- |
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Oct 14 2023, 12:28 AM
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#164
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Member Group: Members Posts: 362 Joined: 13-April 06 From: Malta Member No.: 741 |
So Bennu is a carbon rich near Earth asteroid and yet it is supposed to be pristine meaning that it has remained relatively unaltered since it's formation? Is a Carbon rich asteroid meant to have formed in this region in the early Solar system given that Earth is considered to be a carbon poor planet? If Bennu is carbon rich and thus may have formed in an outer region and now sits as a near Earth asteroid, how can one say it has remained pristine throughout the 4.5billion lifespan of the solar system ?
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Oct 14 2023, 02:09 PM
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#165
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Merciless Robot Group: Admin Posts: 8785 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
ADMIN NOTE: The debate over the definition of the word 'pristine' is now over. Nobody won.
Onward. -------------------- 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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