[time-nuts] Absolute time (was Time of death-Again)

[jmfranke]

I would suggest using the time this thread started because time seems to be 
dragging on since then.

John

--------------------------------------------------
From: "Jean-Louis Oneto" <Jean-Louis.Oneto at obs-azur.fr>
Sent: Thursday, October 28, 2010 1:17 PM
To: "Discussion of precise time and frequency measurement" 
<time-nuts at febo.com>
Subject: Re: [time-nuts] Absolute time (was Time of death-Again)

> Hi group,
> The most absolute remarkable event in our _Universe_ is the Big Bang, and 
> it seems to be pretty well defined in time. It's rather sad that we're 
> unable to relate this event to our usual timescales (with a better 
> precision than several 10^9 years...!)
> That would make a nice "absolute zero" for time, at least in our tiny 
> universe.
> Jean-Louis
> ----- Original Message ----- 
> From: "Brooke Clarke" <brooke95482 at att.net>
> To: "Discussion of precise time and frequency measurement" 
> <time-nuts at febo.com>
> Sent: Thursday, October 28, 2010 4:47 PM
> Subject: Re: [time-nuts] Absolute time (was Time of death-Again)
>
>
>> Hi Bill:
>>
>> The Mayan calendar does not stop in 2012, only the short hand year 
>> notation.
>> It's just like when our calendar stopped at 12/31/99, i.e the next year 
>> was ZERO (aka Y2K)!
>> See:
>> http://en.wikipedia.org/wiki/Mayan_calender
>> http://en.wikipedia.org/wiki/2012_phenomenon
>>
>> Have Fun,
>>
>> Brooke Clarke
>> http://www.PRC68.com
>>
>>
>> Bill Hawkins wrote:
>>> If a far future observer was to make any sense of a date, quite
>>> a lot would have to be known about the culture, including how to
>>> read its markings.
>>>
>>> It would be impractical to carve a map of the sky showing the
>>> location of a stellar beacon on each tombstone, and then adding
>>> some number of rotations of the Earth around the sun to it. How
>>> would you describe leap seconds? Or seconds?
>>>
>>> The use of BC and AD pervades our culture. What's needed is a
>>> Rosetta Stone that has a lengthy description of the relation of
>>> astronomical events to the year 0, after first describing the
>>> time system (Y, M, D, H, M, S). Perhaps radioactive dating by
>>> isotope ratios would be easier than describing years, using a
>>> stellar event to pin down the base ratio to absolute time.
>>>
>>> Any understanding of a culture includes an understanding of its
>>> religions. Perhaps the Mayan calendar would be discovered first.
>>> Too bad it stops in December 2012.
>>>
>>> Bill Hawkins
>>>
>>>
>>> -----Original Message-----
>>> From: Raj
>>> Sent: Thursday, October 28, 2010 9:17 AM
>>> To: Discussion of precise time and frequency measurement
>>> Subject: Re: [time-nuts] Time of death-Again
>>>
>>> T=0 could be a recent supernova for a secular short measurement span
>>> considering the life span of Earth.
>>> OR
>>> T=0 could also be a local solar system event that is easily determinable 
>>> on
>>> Earth.
>>>
>>> For someone measuring events on Earth a million years from now, give or 
>>> take
>>> a ppm :-) or they may not care!
>>>
>>>
>>>> I think this is a sort of relativity question, isn't it?  That is, you 
>>>> just
>>>>
>>> have to pick some place/time, and reference everything else to that.  So
>>> which astronomical event do you want use as your reference (e.g. a T=0
>>> epoch)and is it sufficiently well determined that you can figure it out
>>> later?  It's all well and good, for instance, to use noon on January 
>>> 1st,
>>> 1900 or something as your time zero, but that's hardly a universally
>>> available reference point.
>>>
>>>
>>
>> -- 
>> Have Fun,
>>
>> Brooke Clarke
>> http://www.PRC68.com
>>
>>
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