I thought this review from Astrobites was interesting on what light curves future planetary scientists may be using to detect other earth-like planets in the next twenty years. Here are the links to the review and to the first two articles if anyone is interested on these cloudy nights: http://astroph.wordpress.com/2011/02/21/the-colors-of-a-second-earth/ 1st Article from Cornell Univ. http://arxiv.org/abs/0911.5621 2nd Article from Cornell Univ. http://arxiv.org/abs/1102.3625 -- Jay Eads