This short article describes whole sign house system from the skywatcher’s view.
“Horoscope” came from the Greek word “ωροσκόπος, Horoskopos,” which means “observer of the hour,” denoting the ascendant and the 1st house as we know today. This word is originated in ancient Egypt. At that time, the priests observed the eastern and western sky with measuring hour and observing stars. They used to be called “imy-wnw.t”, hour-watcher, astronomer, or one who is in the hour.
If you have a planisphere, observing the ascendant and MC for a certain time and date is very easy. See the instruction below.
Set the time and date you want.
Find the intersections of the ecliptic ( the yellow line circle below ) and the horizon ( the edge of the oval window ).
The intersection at the left-hand side is the ascendant, the right-hand side is the descendant.
Set a ruler vertically on the center of the planisphere (the green line on the diagram below).
Find the intersections of the ecliptic and the ruler. The intersection in the oval window is MC, the other side ( covered side ) is IC.