Surely astronomical events are rather rubbery.
The distance between the celestial bodies is measured in Light Years,
this must give uncertainties as the exact distances are varying all
the time
and the solution of the many bodied problem is probably chaotic,
meaning that it
may not be possible to deduce exactly where anything was at some
point in the past.
The rate at which time happens depends on the local gravity and that
varies as
everything moves around.
What we need here is a Grand Unified Time to keep cell phones working
through the universe. How would you administer that to a nanosecond?
I am sure Douglas Adams would have had some humorous situations with
excellent moral messages for us if he were still here.
cheers, Neville Michie
On 29/10/2010, at 5:18 AM, Marshall Eubanks wrote:
On Oct 28, 2010, at 2:05 PM, Max Robinson wrote:
How about the crab supernova.
Msec pulsars are much more stable - see http://arxiv.org/pdf/
0911.5534 for some comparisons.
Regards
Marshall
Regards.
Max. K 4 O D S.
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----- Original Message ----- From: "jimlux" <[email protected]>
To: "Discussion of precise time and frequency measurement" <time-
[email protected]>
Sent: Thursday, October 28, 2010 8:30 AM
Subject: Re: [time-nuts] Time of death-Again
Steve Rooke wrote:
One thing we should bear in mind that our tombstone timestamp
should
have things like the timezone, and calendar in use, references,
such
that future people can determine the exact point in time of our
death.
In fact, basing the timestamp on some true reference point would
better than about 2000 years after some event happened on earth as
archaeologists from other words coming to the Earth in the future
would be left to figure out this arbitrary time event. I would
propose
that we relate the year portion (which is the LSB and most
important)
to some celestial event thereby making it possible to document this
easily for future life-forms to determine. The whole year/date
thing
really should be made secular as there is no place for religion
in the
governance of society.
Steve
Is this not the same problem we all face when specifying an
absolute time? Is it TAI? GPS? UTC? etc.
And, then, if you are moving, the local time offsettime relative
to some reference might be different at different times.
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.
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