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From: bertietaylor@myyahoo.com (bertietaylor)
Newsgroups: sci.physics
Subject: Re: Europa and energy transfer
Date: Fri, 1 Nov 2024 12:58:52 +0000
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On Fri, 1 Nov 2024 1:24:33 +0000, Bertietaylor wrote:

> On Fri, 1 Nov 2024 0:24:59 +0000, Jim Pennino wrote:
>
>> bertietaylor <bertietaylor@myyahoo.com> wrote:
>>> On Thu, 31 Oct 2024 14:27:05 +0000, Jim Pennino wrote:
>>>
>>>> Bertietaylor <bertietaylor@myyahoo.com> wrote:
>>>>> On Thu, 31 Oct 2024 0:27:40 +0000, Jim Pennino wrote:
>>>>>
>>>>>> bertietaylor <bertietaylor@myyahoo.com> wrote:
>>>>>>> On Wed, 30 Oct 2024 22:05:55 +0000, x wrote:
>>>>>>>
>>>>>>>> On 10/29/24 21:53, Sylvia Else wrote:
>>>>>>>>> NASA has a mission to the Jovian system, to study Europa. That moon is
>>>>>>>>> interesting because it appears to have liquid water under an icy
>>>>>>>>> surface. The heat need to keep the water liquid comes from the
>>>>>>>>> stretching and compression Europa experiences during its orbit around
>>>>>>>>> Jupiter, the orbit not been exactly circular.
>>>>>>>>>
>>>>>>>>> So much, so simple.
>>>>>>>>>
>>>>>>>>> Some thought made me realise that although the tidal forces on Europa
>>>>>>>>> mean that it is not exactly spherical, its two bulges cannot remain
>>>>>>>>> perfectly aligned with Jupiter, because Europa's angular velocity
>>>>>>>>> relative to Jupiter is higher at periapsis than at apoapsis. The result
>>>>>>>>> is that the nearer bulge is sometimes ahead, and sometimes behind,
>>>>>>>>> relative to Europa's orbital motion, resulting in a net force backwards
>>>>>>>>> along the orbit, or forward along the orbit.
>>>>>>>>>
>>>>>>>>> Again, certainly stuff that's already well known.
>>>>>>>>>
>>>>>>>>> As far as I can see, the energy that is being dissipated as heat inside
>>>>>>>>> Europa has to come from changes to Europa's orbit. Further, if Europa
>>>>>>>>> were either perfectly rigid, or perfectly elastic, there would be no
>>>>>>>>> energy transfer, and consequently no change to the orbit.
>>>>>>>>>
>>>>>>>>> It would make no difference if Jupiter itself were perfectly rigid, so
>>>>>>>>> the transfer cannot involve tides on Jupiter generated by Europa.
>>>>>>>>>
>>>>>>>>> So the existence of the orbital energy transfer depends on Europa being
>>>>>>>>> neither perfectly rigid nor perfectly elastic.
>>>>>>>>>
>>>>>>>>> What escapes me is the mechanism.
>>>>>>>>>
>>>>>>>>> Any thoughts?
>>>>>>>>
>>>>>>>> I am thinking that the standard model for Earth is that supposedly
>>>>>>>> in the 1800s Lord Kelvin did some calculations.
>>>>>>>
>>>>>>> At that time they had thought the universe was only full of stars.
>>>>>>
>>>>>> Utter nonsense yet again, crackpot.
>>>>>>
>>>>>> By 1600 astronmers were well aware of different types of celestial
>>>>>> bodies and beginning to measure distances to such.
>>>>>
>>>>> Did they have a clue about galaxies.
>>>>
>>>> "They" had a clue as early as 450 BCE crackpot.
>>>
>>> No, fool.
>>> They thought the stars were the lights from Heaven.
>>
>> No, not everyone thought that crackpot.
>
> Who in Europe did not before Copernicus?
>>
>>>>
>>>> The first attempts at measuring distant objects where made around 1000
>>>> CE crackpot.
>>>>
>>>> The invention of the telescope in 1610 rather clinched the deal
>>>> crackpot.
>>>
>>> Penisnino, all they found then that crystal spheres MAY NOT exist and
>>> the Earth MIGHT go around the Sun.
>>
>> Utterly wrong crackpot.

Ignorant fool the Penisnino. Wants to change the past by denial after
fucking up the present with e=mcc crap.
>>
>> <snip remaing insane babble unread>