Fusion For centuries, humankind has looked at the stars, and for just as many years humankind has tried to explain the existence of those very same stars. Were they holes in an enormous canvas that covered the earth? Were they fire-flies that could only be seen when the Apollo had parked his chariot for the night? There seemed to be as many explanations for the stars as there were stars themselves. Then one day an individual named Galileo Galilei made an astounding discovery: the stars were replicas of our own sun, only so far away that they seemed as large as pin pricks to the naked eye. This in turn gave rise to many more questions. What keeps the stars burning? Have they alw