If there was an alien civilization equally advanced as us outside of the Solar System or our galaxy, how difficult would it be for them to realize our planet holds life? I mean, i imagine Earth is pretty special and must pique interest of intelligent aliens. And i know that because of the distance it's not possible to see objects far away in their current state but how it looked like in the far past, but still, our planet was teeming with life from pretty early on in it's existance.
>>16991976I don't know why you frame the question like that, civilization of our level (that being us) can't detect reliable life signs anywhere beyond out own solar system because they either don't exists or we can't detect them yet.
>>16991976you can detect water and oxygen and you can guess that there's life there. There wouldn't be direct evidence though
>>16991976We have done atmospheric spectroscopy on K2-2016-BLG-0005Lb ~16,000 LY away.If we detected oxygen and methane it would be a good candidate for life but we couldn't be sure without a probe.
>>16991976>outside of the Solar System"This planet may have or had water">or our galaxy"It's possible there's a planet just like ours out there, purely based on chance"
>>16991976>is pretty specialMy thoughts are that we aren't special at all, there are plenty of planets in the universe just like ours that support life. So aliens have no reason to visit us because there is life closer to them
