Intensity of sunlight at Earth's orbit = 1360 Watts/meter^2 Earth radius = 6371 km How much power does the Earth receive from the sun? Using E=mc^2, how many kilograms of light fall on the Earth each second? Solar wind speed ~ 700 km/s Solar wind density at Earth's orbit ~ 4 protons/cm^3 Mass of sun = 2.0*10^30 kg What is the total power received by the Earth from the solar wind? How much mass/second is lost from the solar wind and how much from light?
The energy required to lift 1 kg of atmosphere from the Earth into space is Energy = G * Mass_of_Earth / Radius_of_Earth Suppose all of the sun's energy went into removing the Earth's atmosphere. How long would it last?