Ephemeris

Similar: Birth Chart, Natal Chart

An ephemeris is a map of the planets.

Since the planets are in constant motion, this map will change constantly. Ephemerides come in either midnight or noon versions and show you where the planets are (or were for a date in the past or will be for a date in the future) at either midnight or noon GMT.

An astrologer uses this as a starting point and then — using logarithms— calculates where the planets would be in the heavens overhead at your date, time, and place of birth to put them into your natal birth chart.

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