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| Thoughts about SETI and SETI@home |
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Given the sheer number of stars in our own galaxy, never mind all the other galaxies we know of, it is almost certain that life has evolved elsewhere. However, the chance of finding another civilzation of advanced beings, who also happen to have discovered radio waves, and started transmitting them long enough ago that they are now arriving on Earth, is far more remote. Our planet is something like 4,500,000,000 years old, yet we have been transmitting radio waves for barely 100 years. How long we will continue to do so is anybody's guess but it is still likely to be a relatively short period of time in the Earth's history.
What, then, are the chances of another planet, orbiting another star, having evolved to a state where the most advanced beings have discovered radio and have not yet been wiped out by some natural or self-inflicted catastrophe? I think the chance is minutely small on a per-planet basis, but mutliply that by the probably millions if not billions of planets out there and we might just get lucky one day. I'll keep SETI crunching in the hope that we do, anyway. |
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