What is the sun? How was it born? How big is it? What is it made of? How hot is it? How far away?
Today, scientists can answer these questions. But until very recently little was known about this source of heat and light so vital to our existence.
In How to Build a Sun, Spencer Weart explains how science has learned such important things about the sun as its size, mass, and composition. He describes the theories, the mathematical formulas, the complex equipment for studying solar phenomena, the experimental models by which scientists have slowly built up a body of knowledge about the sun. And he poses some of the countless questions which still must be answered about the sun and the universe itself. What causes solar flares and prominences; what will happen when the sun dies?