Earth Return & Sample Science |
Earth Return & Sample Science |
Oct 24 2020, 07:02 AM
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#1
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Merciless Robot Group: Admin Posts: 8784 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Now that the 'boop' has been completed (with spectacular success!), we'll move the discussion to here for subsequent mission events.
-------------------- 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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Jan 25 2024, 12:57 AM
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#2
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Member Group: Members Posts: 436 Joined: 14-December 15 Member No.: 7860 |
In my opinion the formation of impact breccias as a result of meteorite impacts may be one of the few "geological" rock-forming processes that occur on Bennu "currently". Plus, of course, thermal and cosmic erosion as a result of temperature changes and the impact of cosmic (mainly solar) radiation.
But we must remember that there is a strong possibility that "present-day" Bennu may be a collection of debris created after a catastrophic collision and recombined. This means that different types of rocks on the surface may come from, for example, different regions of the parent body (or even from two or more different bodies), and the parent body could have been much larger, and "more interesting" geological processes could have occurred on it, e.g. transformation of minerals under the influence of water etc. And finally, among the "pebbles" on the surface there may be fragments of "recent" meteorites from other objects... This all gives some potential for a certain variety of rocks on Bennu's current surface... EDIT: In the case of meteorites falling on Earth, we are usually dealing with single "samples" of individual rocks. But even in these meteorites, you can often see different rock lithologies (e.g. solid rock and breccia) next to each other Unfortunately, the "disadvantage" of the samples delivered from Bennu by OSIRIS-REx is that they come from only one small point on the asteroid. |
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Lo-Fi Version | Time is now: 19th June 2024 - 04:50 PM |
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