Ephemeris) the position of the planets is given for noon at Greenwich and for every day at noon and at Greenwich the sidereal time can be found.
This will cause trouble only in the beginning.
For all places on the meridian of Greenwich we have only to take into account the difference in time before or after noon; but for places on another degree of longitude also the difference in time with Greenwich must not be overlooked.
Every degree difference of longitude makes a difference of 4 minutes in time.
In places east of Greenwich, i.e.
places with eastern longitude, it is later (the sun rises there earlier) and in those with western longitude it is earlier.
San Francisco, which lies on about 120 western longitude has a difference of time of 4'X120 = 8 hours with Greenwich.
So when it is noon at Greenwich, it is as early as 4 a.m.
(See example, calculation o a horoscope, page 92.) For inserting the 12 zodiacal signs in the horoscope we must take into account the latitude of the place (distance from the equator), seeing that the signs rise more slanting according to the increase of distance from the equator, so that a certain irregularity arises.
We need however not trouble about this, because the so-called tables of houses have been drawn up for different latitudes.
The image of the Cosmos, or as it is called macrocosmos in contra-distinction to the microcosmos (man), is impressed in all that exists in nature, so in the human body as well; hence the name microcosmos, meaning cosmos on a small scale.
We shall see presently that each of the 12 signs of the Zodiac corresponds to definite parts of our body.
According to the different signs the planets are placed in at the moment of birth, and according to the positions of the zodiacal signs at the moment in relation to our earth, the body of the native is shaped.
We must observe here that it is not so much the signs of the Zodiac which have that influence, as the parts of the heavens in which these signs are seen.
The 12 signs were in exactly the places, respectively, in the time of Ptolemy, the father of astrology, but since that time the zodiacal signs have shifted a little (about 30 degrees) and this is no longer available.
ephemeris takes this into account and therefore the astronomical ephemeris points out other planets pl ace than the astrological.