That is exactly what I am getting at, also a new injection on the alien subject. Now some believe that aliens actually come from another planet. If this is so who says that they have to come from far, far away? It is said that for another planet to have life it must be fairly equal to the mass and density of our planet. Some of my friends and I hypothesized that this planet could be located at the other side of the sun... it would not be visible to us ever because of its proportions. Eg. Earth=*, planet 'X'=x, Sun= _____
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the planets would never meet because of similar orbits and masses. And we cannot see through the sun obviously, sattelites that orbit the sun do not take pictures of apparent 'empty space', so thus the planet could not be seen. Or if this does not appeal to you, how about an 80% chance of there being life on Europa, and the knowledge of there being liquid water underneath the surface of Ice?