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: Definition of the twilight intervals
    From: Frank Reed
    Date: 2015 Aug 26, 14:26 -0700

    It seems like it can't be just a coincidence that Sky & Telescope published an online article about twilight and its variations just last week: Tiptoe into the Twilight. This is one of Bob King's articles. He writes really terrific pieces about various topics in observational astronomy. I find I learn something new in almost every article of his that I read.

    And for those interested in Wikipedia issues, it will be interesting if this article is soon cited as a source on twilight definitions.

    Frank Reed
    Conanicut Island USA

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join / Get 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