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
    Northern lights navigation puzzle
    From: Frank Reed
    Date: 2022 Nov 17, 21:05 -0800

    There are three navigation stars visible in this photo. Can you determine the photographer's location astronomically? From the photo, what is your latitude? That's not too difficult. But can you determine a rough longitude, too? This probably requires knowing at least the date of the image, and I think that can be determined astronomically as well. My best estimate is 19 March 2012. How? There's a planet visible. Given the date, can we make any estimates of longitude? For the longitude, it's useful (important?) to know that this location is accessible by road.

    With a little more sleuthing (and not merely asking the internet "who took this photo?"), it's possible to narrow things down to the nearest quarter mile or so based on the profile of the mountains on the left. 

    Frank Reed


    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