Can the TV and radio waves we've been sending into space be decoded? Can aliens watch or hear it?

Question

It just unsettles me that an Alien would get his first glimpse of
humanity from JJ on "Good Times", or a chorus of an ABBA
song.......Radio waves have been expanding in a sphere 170
light years across at this point, from earth.
The strange thing is, if we annihilated outselves by nuclear war,
and the human race became extinct, our radio and tv messages would still continue to expand throughout space.
We could blow up in 20 years, and in 20 million years some alien
could "watch" a PeeWee's Playhouse episode!

My question is, do the signals lose strength over time, or are they essentially infinitely decodable and expanding?

I know this is heavy stuff, but better than wasting time thinging about b u l l s h i t......

Answer 1

I think leaving a legacy like Pee Wee's Playhouse serves us right!

Answer 2

definite, you do deliver out radio waves once you textual content notwithstanding this is uncertain that extraterrestrial beings might want to decode that as textual content without some references. the means element might want to also be very low and as means diminishes with the inverse sq. of the gap, there is little probability they could be ready to come back across it. also it would want to take a lengthy time period to achieve an alien if in any respect.