NH Arrokoth (formerly Ultima Thule) Encounter Observations & Results, post-flyby discussion as the data arrives |
NH Arrokoth (formerly Ultima Thule) Encounter Observations & Results, post-flyby discussion as the data arrives |
Jan 4 2019, 01:16 AM
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Merciless Robot Group: Admin Posts: 8784 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
This will be where we talk about the data as it arrives over the next 20 months or so.
-------------------- 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 24 2019, 11:32 PM
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Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
It's a jaw-dropping image: congratulations to the NH science team.
Here's a colorized version, purely for aesthetic purposes: -------------------- |
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Jan 25 2019, 04:38 PM
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#3
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Junior Member Group: Members Posts: 98 Joined: 30-November 05 From: Antibes, France Member No.: 594 |
Very nice work!
Some "scientific artists" of the past had anticipated the shape of that new type of solar system object. Really remarkable! At first sight, I would bet that the density of Thule is higher than the density of the external blanket of Ultima since Ultima seems to have been more distorted by the relatively soft impact wheras Thule seems more uniform (or less distorted). Can the gravitational interactions between the two parts in the rotation process engender landslides or resurfacing events erasing some craters? It's a jaw-dropping image: congratulations to the NH science team. Here's a colorized version, purely for aesthetic purposes: |
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Guest_Steve5304_* |
Jan 25 2019, 05:59 PM
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#4
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Guests |
I would think that you just don't have that much out that far...it unlikely to be any sort of resurfacing...how would that even happen that far out on a dead object like this?? Accretion over millions of years?? |
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Feb 1 2019, 08:00 AM
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#5
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Member Group: Members Posts: 684 Joined: 24-July 15 Member No.: 7619 |
I would think that you just don't have that much out that far...it unlikely to be any sort of resurfacing...how would that even happen that far out on a dead object like this?? Accretion over millions of years?? IIRC, there is a "Stria" paper The Formation of Striae within Cometary Dust Tails by a Sublimation Driven YORP like Effect about cryo-ice sublimation torques, which estimated that CO could still exert some pressure out to 40-50AU. Also, "think fluffy", like aerogels (solid smoke), shuttle tiles, and pink fiberglass insulation, these objects should be exceedingly bad at heat conduction, and a large internal surface area should suppress convection by any internal gasses. I'm really curious about the results from the "radar ping" experiments, billions of years with a surface dominated by sublimation, I'll guess there may be some ice pinnacles or other "twists" that are responsible for the appearance at this resolution. Formation of metre-scale bladed roughness on Europa’s surface by ablation of ice |
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