Re: [Python-ideas] OT: slowing rotation [was: High Precision datetime]

2018-05-18 Thread Greg Ewing

Chris Angelico wrote:

I'm not sure. How long will it take for people to agree on a meaning
for "trillion"?


About a trillion years, I estimate. :-)

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Greg
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Re: [Python-ideas] OT: slowing rotation [was: High Precision datetime]

2018-05-18 Thread Greg Ewing

Stefan Behnel wrote:

So, does that mean we now need to hold our breath for 1.9 british trillion
years or 1.9 american trillion years?


Seeing as the time-to-red-giant is only about 5e9 years,
I don't think it matters much either way.

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Greg
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Re: [Python-ideas] OT: slowing rotation [was: High Precision datetime]

2018-05-18 Thread Chris Angelico
On Fri, May 18, 2018 at 6:27 PM, Stefan Behnel  wrote:
> Greg Ewing schrieb am 18.05.2018 um 10:05:
>> Ethan Furman wrote:
>>> How long before the earth stops rotating?
>>
>> Apparently about 1.9 trillion years.
>
> So, does that mean we now need to hold our breath for 1.9 british trillion
> years or 1.9 american trillion years?

I'm not sure. How long will it take for people to agree on a meaning
for "trillion"?

Oh wait, that's even longer.

ChrisA
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Re: [Python-ideas] OT: slowing rotation [was: High Precision datetime]

2018-05-18 Thread Stefan Behnel
Greg Ewing schrieb am 18.05.2018 um 10:05:
> Ethan Furman wrote:
>> How long before the earth stops rotating?  
> 
> Apparently about 1.9 trillion years.

So, does that mean we now need to hold our breath for 1.9 british trillion
years or 1.9 american trillion years?

Assuming you were referring to the French-Latin-Arabic based numbers and
naming systems at all, that is... And anyway, what's that point doing
there, right between the "1" and the "9" ?

Stefan

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Re: [Python-ideas] OT: slowing rotation [was: High Precision datetime]

2018-05-18 Thread Greg Ewing

Ethan Furman wrote:
How long before the earth stops rotating?  


Apparently about 1.9 trillion years.

> When it does, will we be
> tide-locked with the sun, or will an earth day become an earth year?

Wikipedia says the main cause of the slowing is tidal effects
from the moon, so probably it would become tide-locked with the
moon and then not slow any further.

Having a month-long day ought to make our current fears about
climate change look like a lot of panic over nothing.

However, the good news is that we won't have to worry about
it. The sun will become a red giant and swallow the earth
long before then.

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Greg
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Re: [Python-ideas] OT: slowing rotation [was: High Precision datetime]

2018-05-17 Thread Chris Angelico
On Fri, May 18, 2018 at 5:53 AM, Ethan Furman  wrote:
> On 05/17/2018 12:13 PM, Tim Peters wrote:
>
>> Other things can cause the Earth's rotation to speed up temporarily
>> (like some major geological events), but they've only been able to
>> overcome factors acting to slow rotation for brief periods, and never
>> yet got near to overcoming them by a full second.
>
>
> How long before the earth stops rotating?  When it does, will we be
> tide-locked with the sun, or will an earth day become an earth year?
>
> Inquiring-minds-want-to-know'ly yrs;

Won't ever happen. A few thousand years ago, the planet heard the
adage "one good turn deserves another", and interpreted it as an
infinite loop.

ChrisA
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[Python-ideas] OT: slowing rotation [was: High Precision datetime]

2018-05-17 Thread Ethan Furman

On 05/17/2018 12:13 PM, Tim Peters wrote:


Other things can cause the Earth's rotation to speed up temporarily
(like some major geological events), but they've only been able to
overcome factors acting to slow rotation for brief periods, and never
yet got near to overcoming them by a full second.


How long before the earth stops rotating?  When it does, will we be tide-locked with the sun, or will an earth day 
become an earth year?


Inquiring-minds-want-to-know'ly yrs;

--
~Ethan~

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