Earth's "radio bubble" is well over 100 light years across now. If there are aliens out there, they are probably already on their way to ask us in person why Ross, the largest Friend, doesn't simply eat the others.

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krapp 4 hours ago | parent [-]

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.