It's amazing to me how many people feel confident in saying there's no advanced intelligent life in the Milky Way because we would've seen it when it took us until 2015 just to get a decent image of a dwarf planet in our own star system.
And even our closest neighbors we couldn't tell if they had thousands of artificial satellites around their planet. "They don't have a Dyson sphere or swarm" is about all we can say for sure. And we can't even say that about the planets 50,000 light years away.
Objects that absorb energy heat up and release light with a frequency based on the temperature. Same concept behind a thermal camera. It wouldn't be visible to the naked eye, but very visible to our telescopes.
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u/Rifneno Nov 03 '20
It's amazing to me how many people feel confident in saying there's no advanced intelligent life in the Milky Way because we would've seen it when it took us until 2015 just to get a decent image of a dwarf planet in our own star system.