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
    or...
       
    Reply
    Motion of Geographical Position question
    From: FS
    Date: 2004 Dec 20, 08:16 -0800

    My last question here was answered with such acumen, I
    shall try another...
    
    I am trying to flesh out an analogy to better explain
    the rapidly moving GP of the sun, but have no idea of
    how to do the math to portray it accurately.
    
    Let's say I suspend a pipe, 1cm inside diameter and
    10m long, over the Earth at a point within the
    ecliptic.  At the moment when the Sun's GP coincides
    with my "zenith-pipe", for how long a time will I see
    the light of the Sun making it all the way through the
    pipe?
    
    Of course, I guess I could just go to Home Depot and
    buy some half-inch pipe...
    
    Thanks for any takers!
    
    -Jeff
    
    
    
    __________________________________
    Do you Yahoo!?
    Yahoo! Mail - Find what you need with new enhanced search.
    http://info.mail.yahoo.com/mail_250
    
    
    

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

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

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

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

    Email Settings

    Posting 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