Extent of Human Radio Broadcasts

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And that’s assuming those transmissions won’t have attenuated to the point of utter disappearance into the noise background of the galaxy to begin with.


If I remember correctly, our radio broadcasts have attenuated so much that they are indistinguishable from background radio noise anyway.


puts the whole fermi paradox idea in perspective


This is why the Fermi paradox is so silly. “Where is everyone?” Okay so two questions. # 1. Why has nobody contacted *us*? Answer: because we’re practically invisible. There are upper limits to the resolution of telescopes due to the laws of physics. From light-years away, no civilization will ever create a telescope that could resolve human cities, spacecraft, etc. They could, at best, analyze the composition of our atmosphere or maybe see vague shapes of surface structures if they were insanely massive (think early Pluto images). And if they’re farther out than 100 light-years, then our broadcasted signals haven’t even reached them them. Our galaxy is estimated to be at least 100,000 light-years in diameter. And our signals don’t stay clean, they become little more than background noise fairly quickly. # 2. Why dont we see anyone? Answer: A. It’s possible that life is common, as a byproduct of physics, but that intelligent life with advanced technology is incredibly rare, or develops slowly. In terms of evolution, humans have done a great deal in the blink of an eye. Insects and sharks have existed for millions of years relatively unchanged. We reached out current form 200,000 years ago and within that time went from wild animal in the plains of Africa to the goddamned moon. That might be really fucking unusual, even on a cosmic scale. It could the case that most life stays microbial. B. Lots of life reaches a technological level like ours. But that means unless we luck out and they live real close by, they’re also practically invisible. C. Great Filter: we don’t see examples of megastructures like Dyson spheres because nobody has ever made one or currently has one. Maybe intelligent life just takes too long to develop and they get wiped out by natural, cosmic causes before it happens for them. D. Time: the universe has existed for 13ish billion years. Earth had only existed for ~4. In that 4,543,000,000 years, life didn’t become multicellular until 600,000,000 ago. So for 86% of Earth’s history, life was only microbial. It could be that life IS everywhere out there, but we exist at the wrong time. The nearest rocky worlds could have microbes but won’t become multicellular, IF they do, let alone a civilization (IF they do) for another two billion years. E. Life is not linear. Microbes do not necessarily lead to multicellular life. Multicellular life does not necessarily lead to intelligent life. Intelligent life does not necessarily lead to civilization. It follows natural selection. Evolution should not be thought of as “life adapts to survive.” It doesn’t. That applies a sort of agency to evolution that doesn’t exist. Adaptation is merely a product of what manages to survive. There’s no thought to it. Human intelligence is a product of natural selection, and evidently our intellect is a rare adaptation at that. Sharks and insects have been around for millions of years relatively unchanged. They didn’t grow big brains and make societies. Because evolution doesn’t work that way. Their forms and behaviors are well suited to their ecological niches, and little change has been needed to survive to reproduce. Thus, they haven’t changed much.


So our radio waves are closer to us than the cameraman that took this photo?!?!🤯🤯🤯🤯