NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Extinction
From: Gary LaPook
Date: 2014 Feb 4, 14:27 -0800
From: Gary LaPook
Date: 2014 Feb 4, 14:27 -0800
I thought of that too but the sun had set two hours earlier so it was past astronomical twilight.
gl
From: Geoffrey Kolbe <geoffreykolbe@compuserve.com>
To: garylapook@pacbell.net
Sent: Tuesday, February 4, 2014 2:48 AM
Subject: [NavList] Re: Extinction
gl
From: Geoffrey Kolbe <geoffreykolbe@compuserve.com>
To: garylapook@pacbell.net
Sent: Tuesday, February 4, 2014 2:48 AM
Subject: [NavList] Re: Extinction
Hello Gary The brightness at which you can no longer see an object depends on the ambient light level. So, you will get a different result at night. -- Dr Geoffrey Kolbe, Riccarton Farm, Newcastleton, TD9 0SN Tel: 013873 76715 Mob: 07811 154621
: http://fer3.com/arc/m2.aspx?i=126786
