Our next step is to determine the epoch position for Saturn. Continue reading “Almagest Book XI: Saturn’s Epoch Position”
Almagest Book XI: Jupiter’s Epoch Positions
The last thing to do before finishing up with Jupiter for now, is to determine its epoch positions.
Ptolemy does this by taking the intervals from the ancient observation we explored in the last post. Continue reading “Almagest Book XI: Jupiter’s Epoch Positions”
Almagest Book X: Mars’ Epoch Positions
Now that we’ve ironed out Mars’ position for the time of the Babylonian observation we discussed in the last post, and we’ve revised the periodic motions, it’s time to calculate the epoch position. Continue reading “Almagest Book X: Mars’ Epoch Positions”
Almagest Book X: Venus’ Epoch Position
Now that we’ve worked out the mean speed of Venus about the epicycle, we can now determine where it was on the epoch date. Continue reading “Almagest Book X: Venus’ Epoch Position”