How can a planet be in more than one house during a certain period of a time?
Every so often, planets become retrograde or ‘backwards-moving’, when seen from the Earth. When this happens, they move back into the astrological house they have just come from before finally moving on. For example, Mercury could pass from the third house on to the fourth, then back again into the third. After a while, Mercury will change direction again, moving through the last part of the third house in direct motion, before carrying on through the fourth. In the Daily Horoscope Calendar, Mercury will be regarded as being in the third house until he finally leaves it, even if he has already been in the fourth house for a while during the same period. To get a detailed overview of Mercury’s movement, please select the ‘Graphical Ephemeris for one year’ in the ‘extended chart selection -> Astrodienst Special’, or visit the ‘printable ephemeris section’ accessible from our homepage via the menu in the left column.