Anonymous

Yes, however, only since the 1950s and space is awfully big.

Anonymous

hardly. Indications of such planets are a recent phenomenon, and they are hundreds of lightyears away. We don't have the means to pinpoint the radio signal to the right place at the right time

Anonymous

Yes. But they are too rude to answer us.

Anonymous

Yes.

Anonymous

Yes we have, But to what end?? Radio Signals travel at the speed of light. How far are the exoplanets?? 100's of light years away.

Anonymous

We have been sending radio signals into space for over 100 years - every radio and TV broadcast is moving outward in a sphere at the speed of light.