But the cosmic radiation does not come from the sun. http://en.wikipedia.org/wiki/Cosmic_ray http://en.wikipedia.org/wiki/Cosmic_ray Then, in 1912, Victor Hes

But the cosmic radiation does not come from the sun. http://en.wikipedia.org/wiki/Cosmic_ray http://en.wikipedia.org/wiki/Cosmic_ray Then, in 1912, Victor Hess carried three enhanced-accuracy Wulf electrometers[12] to an altitude of 5300 meters in a free balloon flight. He found the ionization rate increased approximately fourfold over the rate at ground level.[12] Hess also ruled out the Sun as the radiation's source by making a balloon ascent during a near-total eclipse. With the moon blocking much of the Sun's visible radiation, Hess still measured rising radiation at rising altitudes.[12] He concluded "The results of my observation are best explained by the assumption that a radiation of very great penetrating power enters our atmosphere from above." In 1913–1914, Werner Kolhörster confirmed Victor Hess' earlier results by measuring the increased ionization rate at an altitude of 9 km.