It's also based heavily on the geocentric model of the solar system (as opposed to heliocentric), where terms like retrograde refer to the illusion of perspective that causes planets to seem to reverse direction in the night sky based on such geocentric models.
It's all based on your birth month/date and the position of planets on the day you were born or something idk.
Interestingly enough they should be called planet charts because there's little about stars involved.
I knew that much
It's also based heavily on the geocentric model of the solar system (as opposed to heliocentric), where terms like retrograde refer to the illusion of perspective that causes planets to seem to reverse direction in the night sky based on such geocentric models.