Astronomy 115W The Mysteries of the Sun Astronomers once thought of the sun and other objects as simple gaseous spheres governed by the basic laws of the universe; gravity, temperature, pressure. In 1939, the hydrogen fusion reactions that powered the sun were discovered, and the detailed model of the interiors of stars all over the universe followed in the 1950s and 60s. One strange fact that lingers inside the heads of all astronomers and scientists is …showed first 75 words of 2346 total…

…showed last 75 words of 2346 total…