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Hmm, let's say there's 100 billion stars in our galaxy and one billion habitable planets. Assuming we are average, half, or 500 million have civilizations older
by Gravityloss 2y ago
Hmm, let's say there's 100 billion stars in our galaxy and one billion habitable planets. Assuming we are average, half, or 500 million have civilizations older than ours. We could assume some sort of distribution where we could say 10% are older than a million years. So 50 million civilizations older than a million years in the milky way. In a million years moving at 0.1c you move 100,000 light years, or across the whole galaxy.
They could have been here already before modern humans even existed.
- worldsayshi 2y agoSeeing how it took earth 4 billion years to figure out how to get inhabitants to set foot on another stellar body the rise of intelligence may be the unlikely event here. Perhaps it's much more likely to have happened elsewhere in the galaxy 4 more billion years from now. If I remember correctly, stars with our particular properties haven't been around for too long. I recommend looking into cool worlds lab since you seem to like inferring from the numbers.
- mithametacs 2y agoWe've set foot on only 1 other stellar body. Luna is sort of made from the Earth. And it's so close that Earth has a stronger pull on it than Sun. So we have set foot on another stellar body, sure. But we also... kind of haven't. And then we had to retreat from it anyway. Homo sapiens, hunter champions, arrived at an uninhabited body and were outmatched. Way to go, smartest species we know of. You've done jack shit.