Ah sorry, I probably wasn’t clear enough what I meant (and am not super knowledgable here and probably have a western bias). What I meant was civilization defined like this https://en.wikipedia.org/wiki/Cradle_of_civilization not that there weren’t any cultures earlier. I basically just wanted to say that 66000 years is a very long time in human time scales

Sure we can do that, but then we can also just think hard about it and hope anyone hears it, not much of a difference

Sure you can put it farther away, but the sun is massive, it would still need to be pretty big I would guess, but I’m not an astronomer so I don’t know the numbers.

As far as I know we don’t know of any faster way to send signals. That doesn’t make sending the signals impossible, just very impractical.

Hypotheticly yes, but you would need something very big to block the light or reduce it. Planet sized for example, this is one way we detect planets around other stars, by measuring how much the light dims.

Another potential problem is that (at leas according to this wikipedia article https://en.wikipedia.org/wiki/List_of_nearest_galaxies) the closest galaxy is around 33000 light years away. So any signal we send will take 33000 years to get there and any potential return would take the same amount of time, so 66000 years in total. That is far longer than any human civilization exists

Or if the conservatives didn’t kill our solar industry in the eraly 2010s we could have had a lot more renewables

The idea in germany are old mines, we already have some “temporary” solution (an old saltmine) but there are some problems with it. Understandably there is a lot of nimbyism around the permanent storage, which makes finding a good spot a lot harder

No we didn’t. At least in all charts I could find (here for example) the usage of coal and gas did not change in the worst case and went down in the last few years because renewables increased

But long term storage also isn’t easy. Maybe it’s less of a problem in the US (you’ve got a lot more free space where no one lives) but it has to be made sure that it does not contaminate the surroundings, even in thousands of years and more. Another (as of yet unsolved) problem is far more human. How do we mark those places, if at all. See this article https://en.wikipedia.org/wiki/Long-term_nuclear_waste_warning_messages

Badly and those aren’t even the only problem with coal power just skim through this article about the Hambscher Forst https://en.wikipedia.org/wiki/Hambach_Forest I am not saying that nuclear is the worst way to generate power, but if germany would have wanted to continue using it, the time would have been 20-30 years ago. The last exosting plants, which were shut down a few years ago, weren’t up to the task anymore, especially when looming at the problem france’s reactors have with the heat every year

How is the waste not an issue? I have never heard the argument of it being stolen to be honest. Here in germany the problem with the waste is, that there is no good place to put it (though this is partly a political problem)

I assume you are talking about fission. We (Germany) somewhat famously don’t have nuclear power anymore and I think that is a good thing. IMO the risks overweigh the benefits, and I don’t only mean the risk of a nuclear power plant blowing up. Aside from that there are two mayor downsides.

First they are fucking expensive to build at least any recent projects I have heard of are billions over cost.

Second is the waste problem which specifically is a hot topic in germany, there just doesn’t seem to be a good way to get rid of it. I have read some comments saying that there are ways to deplete them even more but never heard of such a system being actually used.

A minor point for me is also that I think, that less centralised infrastructure using wind and solar energy is a better way to go.

Some proponents (especially online) love to talk about “small” reactors, but I’ve never heard of one actually being in use, at most there were tests of it is actually feasible (as far as I know at least, and I am not an expert)

Ah yes, a 20min old account promoting a webstie that has (as far as I could see) zero information about who runs it. The post does not even actually link the site in markdown. Seems like a very legit and trustworthy project

I just blocked all the obvious bota