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The Great Filter
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this post was submitted on 21 Nov 2024
622 points (100.0% liked)
Comic Strips
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Comic Strips is a community for those who love comic stories.
Rules
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π Be Nice!
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ποΈ Community Standards
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β Correct: https://xkcd.com/386/
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Note: This is not a rule, but a helpful suggestion.
When posting images, you should strive to add alt-text for screen readers to use to describe the image you're posting:
Another helpful thing to do is to provide a transcription of the text in your images, as well as brief descriptions of what's going on. (example)
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Well, presumably more than a few dozen light years away. A few dozen lightyears is nothing on a cosmic scale.
Right, a few dozen light-years is like... Less than a rounding error lol. The Milky Way galaxy alone is like 100,000 light years across, and around 1000 light years thick. If we treat the Milky Way as a cylinder, that's a volume of roughly 8 trillion cubic light years to sift through.
Granted, a cylinder is a massively naive simplification for calculating the volume of the galaxy and probably way overestimates things. But even dropping that estimate down several orders of magnitude, billions, or even millions of cubic light years is still an unimaginably large region to search for life. And that's just one galaxy. There's billions of galaxies (that we know of), and some are even bigger than the Milky Way. Searching through all of that for life, especially when we don't really know exactly what to look for, is a hilariously huge task.
I doubt any civilisation has made intergalactic travel. There are enough worlds in any galaxy that there is very little purpose in venturing to another galaxy. The distance between galaxies is also insane. Even with faster than light warp speeds it would take thousand of years to reach a different galaxy.
There are habitable planets orbiting about one in five stars. So a few hundred habitable worlds in that range. Why do none of them transmit?
If I'm not mistaken, the habitable means posibility of liquid water. I'm not aware of any of those planets to be truly able to host a life as we know it. It's always either high radiation, toxic atmosphere, tidal lock, or dozens of other things...
And how would they even transmit? We can barely talk to Voyager that's basically on our own front lawn. A planet out-shouting it's own star seems a bit sci-fi.