Now and then scientists discover planets around other stars, various techniques are used. But it are always indirect proof. What would it take to actually photograph such a planet? Is it humanly ever possible to make a telescope on earth (or at the moon or whatever) to photograph earth sized planets, in a reasonable resolution that we can see continents, oceans? I am not talking about seeing alien footprints on a planet, just to have visually an idea of what such a planet look like. A resolution similar like the best Uranus pictures we get from Hubble, or how we see Mars through amateur telescopes. <br /><br />How big would such a mirror need to be? Or is it just impossible to do that?