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?