I'm writing my own astrology chart software.

Where do I get the formulas to calculate planetary positions for a given time input? Are they published somewhere? I did a search but nothing of substance came up. There are some "ephemeris" tables that don't help me; I don't want tables, I want mathematical input/output formulas.

Where do I get the formulas to calculate planetary positions for a given time input? Are they published somewhere? I did a search but nothing of substance came up. There are some "ephemeris" tables that don't help me; I don't want tables, I want mathematical input/output formulas.

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