The astrologer then converts this into the local sidereal time at birth in order to be able to calculate the ascendant and midheaven.
The astrologer then has to convert this into the local sidereal time at birth in order to be able to calculate the ascendant and midheaven.
Using an object's right ascension and the local sidereal time it is possible to determine the time of its culmination (see hour angle).
The sidereal time will be included, as well.
When one moves eastward 15 in longitude, sidereal time is larger by one sidereal hour (note that it wraps around at 24 hours).
It is practically proportional to the sidereal time, which is also a direct measure of earth rotation.
Later, he envisioned a clock that would show every conceivable type of time, from sidereal time to the rotation of the planets.
Sidereal time is time by the stars.
