The Milky Way, a vast celestial river in Andean cosmology, crosses the Peruvian sky at an angle of about twenty-eight degrees to the earth’s orbit. For six months the stream of stars slants across the sky from, so to speak, northeast to southwest; the other six months it slants from southeast to northwest. The transition roughly coincides with the transition between dry and wet seasons—the time when the Milky Way releases life-giving water to Pacha Mama, Mother Earth—and divides the heavens into four quarters.
