I recently listened to a streamed program from physicsworld.com titled The Eerie Silence: Are We Alone in the Universe . It made me wonder if we were using a very limited approach to our search for extraterrestrial life. The question is if you were to design a deep space probe, how would you go about it. For example, imagine you are building an unmanned space craft and you were to target potential exoplanets (new planets discovered outside of our solar system), and the project would last for say a century. Would you install a Hubble like telescope, gamma ray detector, surface topography mapping capability, etc. Could we communicate with a satellite that traveled at a fractional C speed over a couple of human generations. What type of communication problems would be encountered? Could we use solar energy? or nuclear? to energize it. I think two-way communication is unlikely if our deep probe is several light years out but could report back to earth continuously or intermittently over several decades? Should we even attempt such a venture? Should every capable country participate?
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