Welcome to the NavList Message Boards.


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

Compose Your Message

Add Images & Files
    Re: Captain Cook & celestial navigation
    From: Robin Stuart
    Date: 2020 Feb 2, 10:53 -0800

    Geoffrey you wrote:

    "Seems to me that a letter to the Sky & Telescope pointing out the several deficiencies of the article is in order."

    A letter has been sent and Roger Sinnott is on the case.

    I'm not sure that it will result in a printed correction. In my experience they are pretty good at ignoring mistakes. Recently I sent a letter pointing out that in the December 2019 edition an otherwise engrossing article entitled Just Over a Century Ago opens with the inspirational words "A few years ago, it was said that the sum total of human knowledge doubled every five years, but today it seems more like exponential growth". 

    Lest there be any doubt something that doubles every 5 years is growing exponentially. If t is the time in years the growth factor is 2^(t/5) = exp( ln(2) t / 5 ) = exp( 0.1386 t ).

    No response.

    Robin Stuart

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    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 Settings

    Posting Code:

    Custom Index

    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