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
    An Amazing and Unexpected Coincidence
    From: David Pike
    Date: 2022 Jan 17, 12:47 -0800

    Last Night I was doing some reading with respect to the obliquity of the Earth’s and the Moon’s orbits in preparation for doing some outdoor tests on direction from the Moon’s Horns which I hope to look at over the next few weeks. 

    Today was a great day for a walk, so we drove down the A46 and parked at a smashing café/ charity shop, Dove Cottage (52°53'02"N, 0°52'44"W), for coffee.  As usual, despite good intentions, we came out with more that we went in with (jigsaw puzzles and DVDs, not Covid (we hope)).  Then we walked 10,000 steps (4 miles) along the disused Grantham Canal and back toward our 1000miles in 2022 challenge.

    Back to the celestial bit.  Driving home we’d just turned onto ‘Long Lane’ (52°53'07"N, 0°51'16"W) at 16.00 UTC when we noticed the Sun at about 2° above our horizon was shining directly into our rear window while the almost full Moon about 4° above our horizon was directly in the centre of our front windscreen.  Mrs P asked why the Moon was so bright and I was able to casually mention that the Moon was reflecting light from the Sun which had passed over the Earth because the orbital planes weren’t quite parallel. I considered going on to explain eclipses of the Moon but decided to quit while I was ahead.  If you're quick, Mid and Western US observers might just be able to catch this. I know it happens every month, but this was the first time I've had it strike me in the face. DaveP

    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