Dear Friends: 1.- Does anyone know the exact equation of time as a function of the day, month and year? 2.- Does anyone know a web page were I can find the geographical position of cities all around the world? 3.- Can anyone tell me where (and how) I can obtain the ZONWVLAK software, designed by Fer J. de Vries. Is there an English or German version? 4.- Does anyone know how to obtain the instantaneous obliquity of the Earth orbit? As far as I remember, there is an equation obtained by Prof. Simon Newcomb.
Thanks in advance for your help. Sincerely - Achim Loske.
