On Mon, 25 Mar 2002, Willy Leenders wrote: > The spring equinox was about at 3-20-2002 18:50 UT > Midsummer is about at 6-21-2002 13:10 UT > The autumn equinox is about at 9-23-2002 04:40 UT > The difference between the time from spring equinox to midsummer on one > hand and the time from midsummer to autumn equinox on the other hand is > about 21:10 hours. > > One should suppose there will be no difference in time between the > positions of the sun at declination 23.44? to 0? and between the > positions at declination 0? and -23.44?. > > Can anyone give me an explication of this difference? > Willy Leenders,
you found experimentally that seasons have not the same lenght!! You found also Equation-of-Time. Look at http://www.analemma.com/ My best regards Piero Ranfagni ************************************************************************ * Piero Ranfagni * * office Tel +39 055 2752 308 * * fax +39 055 2752 292 * * e-mail [EMAIL PROTECTED] * * www www.arcetri.astro.it/Italiano/EduPage * * * * Home Tel +39 055 487209 * * Tel +39 0588 23037 * ************************************************************************ -
