Unless an alien civilization is relatively close to us (within about 24 Light-years), we would not have gotten a reply yet. That’s 24 years for our signal to get to them and 24 years for a return message to get back to us = for a total of 48 years. (1974 is 48 years ago.)
Unless an alien civilization is relatively close to us (within about 24 Light-years), we would not have gotten a reply yet. That’s 24 years for our signal to get to them and 24 years for a return message to get back to us = for a total of 48 years. (1974 is 48 years ago.)