Is Astrology an art or is it a science?

This may seem like an odd question, but the fact of the matter is that astrologers appear to want to have it both ways. On the one hand, they claim that what they do is something like an art, requiring a particular "feel" for the nature of celestial events and human beings. On the other hand, they try to paint their work with the brush of scientific accuracy and validity in the hopes that such an association will help justify what they do.