Why NASA Keeps a Close Eye on the Sun's Irradiance
Tuesday, May 25, 2010 - 16:31
in Astronomy & Space
(PhysOrg.com) -- For more than two centuries, scientists have wondered how much heat and light the sun expels, and whether this energy varies enough to change Earth`s climate. In the absence of a good method for measuring the sun's output, the scientific conversation was often heavy with speculation.