Analemma

1999-03-02 Thread Chris Lusby
Daniel Lee Wenger [EMAIL PROTECTED] writes: On my globe the significance of the analemma is apparent. Each analemma represents the geographical position of the sun at mean time 6, 7, 8, 9, etc. for each day of the year. In fact the geographical postions of the sun at those mean time hours

New Pictures of Wenger Sundial

1999-03-02 Thread Daniel Lee Wenger
Dear Fellow Dialists I promised photos of my newest sundial and they are now on my web site. A set of pictures is at http://www.wengersundial.com/dialPicture.html The photo at http://www.wengersundial.com/dial1.html shows the detail of the analemma and the scribed features of the dial. This

Re: Calendar Reform

1999-03-02 Thread John Schilke
Since one major insurmountable objection to the Achelis-type World Calendar, especially to Jews and other religious groups to whom the preservation of the 7-day week is important, has anyone considered a calendar of 364 days, divided just as in the World Calendar, but instead of a

Re: Analemma

1999-03-02 Thread Luke Coletti
Hello, It is true that the Analemma is a graph of the EoT vs. Dec but I would recommend that EoT values that are the computed points of an Analemma be based on a four year average if one is, as I am guessing, correlating the imaged solar position along the Analemma to an exact date. One

Re: Analemma

1999-03-02 Thread Luke Coletti
Hello Again, My mistake below: I should have said the zero(s) of obliquity at the Equinoxes... Luke Luke Coletti wrote: it is the phase relation between the two events (i.e., the maximum of eccentricity at Perihelion and the min(s) of obliquity at the Equinoxes) that drive the

Re: Viscosity, GMT and UT1

1999-03-02 Thread Slawomir K. Grzechnik
Hi David, Richard et. al. None of us is picky, we are discussing things. 1. David, you wrote Flight would work quite well without viscosity. The lift generated by aircraft wings is due to a pressure difference above and below the wing, and this is created by the shape of the wing. Whilst