Saving Earth - for a while: Could we shade the Earth from the Sun at a rate that keeps up with the Sun’s increase in Luminosity? There is a theoretical Dyson’s Ring that could be built around the Sun that would be used to tap the energy of the Sun. Could we construct something like that to shade enough of the Sun to extend the life of Earth as the Sun’s luminosity increases 10% every billion years. In effect, we would need to construct a permanent partial solar eclipse. Once built we just need to add on as the Sun’s luminosity increases. As I understand it we have about ½ billion years to get this up and running - initially blocking only 5% of the Sun.