It was a hot, late summer evening in Tuscan wine country — and, unexpectedly, I was getting a lesson in astrology. Inside a grid of cool, lush green vines, amid hills and valleys rippling toward the horizon, a cherubic woman in a wide straw hat named Helena Variara was pointing toward the sky. “You have days of fire, air and days of earth — the 12 constellations are our helpers,” she said matter-o