Dear Neville,
Here is a quote from one of Steven's earlier e-mails. It is the
'additional component of motion' that Steven mentions below that I was
referring to as a 'fudge' factor.
Jack
'over a period of twelve months. This, too, is rotational
movement, where the period of rotation is one year and the orbital radius is one
astronomical unit.
But the problem with this is, if the Earth is always
keeping aligned with the Northern celestial pole, then it cannot at the same
time stay aligned at the same time with the Southern celestial pole. Another way
to imagine this problem is this:How does heliocentrism account for this? A
peculiar additional component of motion has to be
attached to the Earth in order to satisfy the requirement of accounting for what
we actually see
