| Description | Gold was interested in Singer's Science paper on Venus. He had thought of this possibility also, but capture is so much less probable than collision, that if there was no reason to favour one of the other, then collision ought to be assumed; either will do for the spin. Encloses a reprint of Soter and himself discussing how to get from an initial retrograd spin to the present condition, which surely must be locked by the earth - the coincidence is too great otherwise. For this one certainluy has to start from a retrograde, preferably not very fast spin. |