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How long would it take radio waves to travel 3 billion light years? If it is a communication it would be from very far in the past. Assume it takes life about
by nautilus12 8y ago
How long would it take radio waves to travel 3 billion light years? If it is a communication it would be from very far in the past. Assume it takes life about the same time to evolve on other planets wouldn't that mean that we wouldn't expect to start hearing radio communications until billions of years from now?
- iamatworknow 8y agoRadio waves travel at the speed of light...so 3 billion years.
- gnulinux 8y agoYes, assuming this is an actual intelligent life sending us radio waves, we're seeing their signals sent 3 billion years ago. So it's entirely possible their species already went extinct or they left their home planet for galactic expedition. Practically, nothing is the same about this civilization since they sent this signal. To put this into perspective: when this civilization sent this signal, there was merely unicellular life on the earth!