Radio signals do weaken and dissipate over time and space. Broadcast signals could fade into the cosmic microwave background in a few light years depending on their strength. The sci-fi trope of aliens picking up Earth tv and radio just isn't plausible.

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exe34 3 hours ago | parent [-]

And in that light, you're worried two blocks the size of a small car will get picked up on the alien's hyperspace scanners?

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bananamogul 2 hours ago | parent | next [-]

Yet we spend tax dollars trying to do the same thing.

	▲	kibwen 2 hours ago \| parent [-]
		No, we don't. If you're talking about SETI, that's looking at radio signals. If you're talking about killer asteroid early-warning detection, we generally don't have the capacity to reliably detect voyager-sized asteroids even in our own solar system, let alone in interstellar space.

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krapp 2 hours ago | parent | prev [-]

I'm not, but other people seem to think it's a problem worth worrying about.