Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    Name or NavList Code:
    Email:
       
    Reply
    Re: Navigation without Leap Seconds
    From: Lu Abel
    Date: 2008 Apr 17, 23:48 -0700

    frankreed@HistoricalAtlas.net wrote:
    > I'm sure
    > someone will invent a solution, especially if anyone can think of a
    > practical application of these super-clocks. It may be the case, though,
    > that the business of ever more accurate time measurement has hit a brick
    > wall with no means of comparing clocks at different locations which may last
    > for a few decades conceivably.
    That seems like the problem -- clocks are so accurate that the act of
    moving them will literally cause them to lose time -- Einstein's Theory
    of Relativity says the time passes more slowly for something in motion
    than something that's at rest.   So how to take two clocks at different
    locations and compare them??  Have them send signals (ala listening to
    WWV or some other time station to set one's watch)?   That takes time.
    Synchronize a portable clock to one of the ultra-precise clocks and take
    it to the other?  The very act of moving the portable clock will throw
    it off.    A mind-boggling challenge.    Maybe we've just gotten too
    good....
    
    Lu Abel
    
    --~--~---------~--~----~------------~-------~--~----~
    Navigation List archive: www.fer3.com/arc
    To post, email NavList@fer3.com
    To , email NavList-@fer3.com
    -~----------~----~----~----~------~----~------~--~---
    
    

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

    Enter the email address associated with your NavList messages. Your NavList code will be emailed to you immediately.
    Email:

    Email Settings

    NavList ID Code:

    Custom Index

    Subject:
    Author:
    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site