Richard S. wrote:franco b wrote: That's a 30 billion to one shot. Then, of course there is the distance involved meaning travel for thousands of years.
Franco I've read estimates of up to 1 trillion stars in the Milky Way alone. For arguments sake lets say each star had 8 planets, that's 8 trillion planets and of course we aren't counting moons some of which could dwarf earth. The estimates for galaxies range in the hundred of billions that are observable and some of them are enormous compared to ours and could have a hundred trillion stars. See where this going? The stars alone even before we get into the number of planets and moons that could potentially support life is an absolutely astronomical number. You're 30 billion to 1 shot is starting to look like a pretty small number isn't it?
FYI if you could travel at the speed of light, or 186,282 miles per second, you could cross the Milky way end to end in about 100,000 years. The closest solar system is nearly 5 light years away. The distances are astronomical too.
Having said that if you had civilization that was advancing for 1 million years perhaps they might have some tricks up their sleeve? Imagine where we are now and even how much advancement there has been in the last 100 years alone. As you gain more knowledge it's a multiplying effect similar to how computers double their speed every year. Where would humans be in 1 million years if we are still here?
Understanding and appreciating what a light year really boggles the mind too. Traveling 186,282 miles per second, it's the distance you could go in a year at that speed. Or said another way, 60 seconds x 60 minutes x 24hours x 365 days x 186282.