Incredible Technology: How to Search for Advanced Alien Civilizations | LiveScience January 14, 2014Posted by sandyclaus in Drake Revisited.
Theoretical physicist and mathematician Freeman Dyson first proposed the idea that advanced alien civilizations might develop technology to encircle a star and harvest most of its power, a structure now known as a Dyson sphere. If these objects do exist, astronomers might be able to detect the waste heat they produce using telescopes that peer into space using infrared light.
\”The main point,\” Dyson told LiveScience, \”is looking for aliens who don\’t want to communicate. My question was, \’How do you look for silent aliens?\’ They have to radiate away their waste heat. The only way to do that is to radiate lots of infrared radiation.\” [13 Ways to Hunt Intelligent Aliens]
Now, astronomers at Pennsylvania State University are starting to narrow the search for Dyson spheres. But the search has only just begun, and may take hundreds of years, Dyson said. Finding Dyson spheres isn\’t inevitable, but \”it\’s certainly possible,\” he said.