Jeff Duntemann's ContraPositive Diary

http://www.duntemann.com/may2002.htm

the fun part about astronomy. You never know what's going to happen. Is Delta about to blow up? Probably not. Is the new brightness permanent? We have no way to know except to wat

personal

http://www.notpurfect.com/main/personal.html

chemistry,  astronomy, and just about every other branch of science. The world is full of wonderful fascinating things and it is unfortunate that we live long enough to be ac

The Solar Terms and the Chinese 60 Year Calendar Cycle

https://friesian.com/chinacal.htm

[ note ]. Chinese astronomy divides the year into twenty-four parts ("fortnights"), based on the longitude of the sun on the ecliptic. These are called the " Solar Terms ," or the

Find more...