Moreover, the first broadcasts that were sufficiently powerful to break through our ionosphere took place in the late 1930s.
Meaning, the first thing they'll see is probably Hitler.
Man, no wonder nobody comes to say "hello". I bet our dumpster fire of a planet is a wicked show, though.
@drq I'm sure you've seen the opening sequence of the film Contact? It deals with exactly this and is spectacular:
https://yewtu.be/watch?v=EWwhQB3TKXA
One of my favourite sequences in cinema.