Even if another life existed out there at an ideal distance to be receiving our first radio signals now, and they could receive it, and they were at a similar enough technology level…
This would also mean they were ~100LY away, or a 200 year cycle to communicate, once they deciphered our signal.
Yeah with all the time in the universe and how short our civilization has been technological I’m a big fan of the theory that the galaxy is just a big graveyard of civilizations that sprouted and died over the past few billion years. Maybe there’s another few right now dotted around but we’ll never know before we or they die out.
I mean, even if there were many civilizations, I’m betting that any that are smart enough to explore the cosmos have realized one or multiple of the following:
It’s possible to ‘explore’ a massive amount of detail without leaving your home system.
Any civilization that can communicate over vast distances also has vast capability to deliver power to an acute area.
Any civilization on the cusp of 2 is capable of ridiculous levels of distruction, and it’d be wise to make sure they’re totally peaceful before making them aware of you.
… Also, I’m a firm believer that humans and other megafauna are, well, mega. Humans are insanely massive on the scale of life as we know it, and life may not need to become so massive to never the less spread out. For all we know, Earth is a battlefield of life that is successful in the grand scheme of things, and humans et. al. are like the Death Stars of the ancient civilizations that are very much still alive.
(ok ok that last bit is very hyperbolic but it should still convey the idea!)
They wouldn’t receive the signal if they’re at the same tech level. Radiation from our communication tapers off well below background levels at 100ly. Maybe if they got lucky and had very, very sensitive instruments aimed our way at the right moment, they might detect something that didn’t fit background, but our power output pales in comparison to the cosmos.
Just look at all the tricks scientists have to pull to communicate with Voyager, and it’s not even outside of the frigging solar system, yet!
Yep. Inverse square rule has our radiation signature indistinguishable from cosmic background in a quick fast hurry. In fact, we don’t have the power to transmit anything far even on purpose!
What kind of alien god is looking on from deep space in the upper right? I see two eyes, a mouth, and the dark shading varies just enough to look vaguely like a head.
I’m starting to think maybe I’ve had a few too many arguments intense discussions with alien conspiracy theorists…
So ground based observatories have long benefited from the development of adaptive optics. That's basically where you have a small mirror that is synced to the movements of the upper atmosphere and essentially cancels out the shimmer that makes stars twinkle to the naked eye, bringing them into a sharp focus more like what you would get from a space telescope. But the tech can only achieve this feat over narrow patches sky, meaning wide field observatories were left out. I think that's what they're talking about here? You can't get much more wide field than Vera Rubin.
I believe this is a new deconvolution image stacking algorithm that can easily be run in hardware. It should work with any observatory. The math is far enough above my head that I can’t be sure though.
It would be cool if this makes it into software that people could use at home. I would love to see what amateur astrophotographers could to with it.
Hopefully, this new algorithm is not overly taxing. The amount of processing they’ll have to do to keep up with Rubin must be staggering. It’s got what, a 3.2 Gpixel camera mapping the entire night sky every few days. And then all that data has to be processed across the timeline of past observations. I wouldn’t be surprised if the computational demands are what kept it from becoming a reality until now.
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The saga started two years ago at Caltech’s Zwicky Transient Facility located at the Palomar Observatory in San Diego County, California. There, astronomers from Harvard University, the Smithsonian’s Center for Astrophysics, and MIT tasked a newly designed machine learning algorithm to scan the night skies for odd explosions in real time. Operators hoped that quickly flagging possible targets in this way could offer vital extra time for ground and space telescope array observations around the world. In July 2023, the AI system sighted one such event, which astronomers classified SN 2023zkd.
Comparative scanning of the night skies is a good use for AI.
There’s lots of good uses for AI, but people seem to equate AI with LLMs these days so I feel the need to point out that this is not a good use case for LLMs
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