Compilations of weather satellite data by Danish National Space Center scientists indicate that cloudiness varies according to how many atomic particles are coming in from exploded stars, contradicting the theory that the rise in temperatures since the mid-20th century is due to man-made greenhouse gases.
Scientists have long been stumped about the origins of high-energy cosmic rays. They hope a new observatory will substantiate one of several theories on how the rays came into being, and shed light on the origins of the universe.