Recent content by lk31

okay thank you, i really appreciate all of your help!

thank you for your reply, much appreciated. The only way I can see how this question would work is if I assume that the energy absorbed by the Earth is equal to the energy emitted by the sun. Then I can use the sun's initial luminosity and the red giant luminosity, plug the values into the...

Homework Statement in about 6X10^7 y from now, the sun will be a red giant star with a temperature 1/2 its present value and a radius 100 times larger. a) what will be the luminosity of the red giant sun be compared to its current value? b) assume that the new luminosity gives you the...