There is no proof of intelligent civilizations, It's just imagination. A television antenna can't catch the satellite signals so my point remains the same If their technology different from ours?
It is quite possible their systems missed our signals or our system missed their signal. When we talk about the space there are thousands of imaginations:)
I think the signal will be sent in a simple encoding understandable to all intelligent civilizations.
There is no proof of intelligent civilizations, It's just imagination. A television antenna can't catch the satellite signals so my point remains the same If their technology different from ours?
It is quite possible their systems missed our signals or our system missed their signal. When we talk about the space there are thousands of imaginations:)