NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Long-term orbit predictability: was [Nav-l] Delta-T
From: Frank Reed CT
Date: 2004 Dec 5, 15:30 EST
From: Frank Reed CT
Date: 2004 Dec 5, 15:30 EST
George H wrote:
"Here we disagree, and strongly. Unpredictable divergences show up over
a
MUCH shorter period, tens or perhaps hundreds of thousands of years
(depending on what accuracy is being called for)."
MUCH shorter period, tens or perhaps hundreds of thousands of years
(depending on what accuracy is being called for)."
LOL. An unfalsifiable statement!
And:
"He concluded that predictability of the orbits
of the inner planets of the solar system, including the Earth, is lost
"within a few tens of millions of years"."
of the inner planets of the solar system, including the Earth, is lost
"within a few tens of millions of years"."
THAT is a fair statement. The positions of the planet can be predicted for
MILLIONS of years, but beyond that, only statistical analyses are possible so
far.
Of one of my comments, George H wrote:
"Which I suggest is no more than word-play."
Do you disagree with what I wrote, or are you just criticizing my
prose?
No reply necessary. This thread is now WAY off-topic for Nav-L. I'm going
to try to jumpstart some navigational threads.
Frank R
[ ] Mystic, Connecticut
[X] Chicago, Illinois
[ ] Mystic, Connecticut
[X] Chicago, Illinois