Pleiades (Greek mythology) Hesperides, nymphs of the morning star. After Atlas was forced to carry the heavens on his shoulders, Orion began to pursue all of the Pleiades, and Zeus transformed them first into doves, and then into stars to comfort their father. The constellation of Orion is said to still pursue them across the night sky. One of the most memorable myths involving the Pleiades is the story of how these sisters literally became stars, their "catasterism". According to some versions of the tale, all seven sisters committed suicide because they were so saddened by either the fate of their father, Atlas,
Ultimate fate of the universe universe would remain static. After Hubble announced his conclusion that the universe was expanding, Einstein wrote that his cosmological constant was "the greatest blunder of my life." An important parameter in fate of the universe theory is the density parameter, omega (formula_1), defined as the average matter density of the universe divided by a critical value of that density. This selects one of three possible geometries depending on whether formula_1 is equal to, less than, or greater than formula_3. These are called, respectively, the flat, open and closed universes. These three adjectives refer to the overall geometry of the universe,