Re: Relevant - Plate Tectonics Might Only Occur on 0.003% of Planets. That Makes Earth Very Special Indeed.

On 7/4/2024 10:25 PM, Dimensional Traveler wrote:
> On 7/4/2024 4:49 PM, a425couple wrote:
>> On 7/4/24 12:33, Dimensional Traveler wrote:
>>> On 7/4/2024 9:54 AM, a425couple wrote:
>>>> Big DEAL !!
>>>> So many times greats like Heinlein and Silverberg have written
>>>> about us going to exoplanets, and it being like Earth.
>>>> Sorry,,,, NO!
>>>>
>>>> from
>>>> https://www.universetoday.com/167659/plate-tectonics-might-only-occur-on-0-003-of-planets-that-makes-earth-very-special-indeed/
>>>>
>>>> Plate tectonics: Image Credit: NASA/Goddard Space Flight Center 
>>>> Scientific Visualization Studio
>>>> POSTED ONJULY 2, 2024 BY SCOTT ALAN JOHNSTON
>>>>
>> -----------snip-------
>>>>
>>>> Go to the citation for the rest ----.
>>>
>>> I went to the citation but couldn't find if that 0.003% is of ALL 
>>> exo-planets or just the Terrestrial/Super-Terrestrial types.
>>>
>>
>> "the rest" of the citation, did not give a lot of specific information.
>> Hopefully we will see a lot more on this research in the future.
>>
> I also think there's a flaw in their basic assumptions.  If you have a 
> rocky planet with a liquid core/mantle, you are going to have plate 
> tectonics.

Venus, Mars, and Mercury suggest otherwise.

My impression is that the existance of a (relatively shallow)
water ocean is critical. There's also a suggestion that a major
meteor impact may have been involved in starting the process.

pt