Don Cross c7095c5038 Added Python demo ecliptic_of_date. ...

The demo program ecliptic_of_date.py shows how to
calculate the true ecliptic of date (ECT) angular coordinates
of the Sun, Moon, and planets for an observer somewhere on the Earth.
It calculates the equatorial of date (EQD) coordinates, then uses
a rotation matrix to convert the vector to ECT, then converts
the vector to spherical coordinates: latitude, longitude, and distance.

2023-10-02 16:36:56 -04:00

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