KIC 8462852 – Is there a Dyson Sphere out there?
So you may, or may not heard of a weird little event that happened last year when indications from a mysterious star designated KIC 8462852 (I wish NASA would name these stars) propped up the heads of the scientific community. Observations from 2009-2013 showed the light dimming from the star, which is 1500 light years away, from between 15-22%. Now, before we all go nuts here and start talking about alien mega-structures, it must be noted at this point that SETI has been pointing its dishes at this star and has so far not found any evidence of any radio transmissions. As we all know by now, extrasolar planets are detected by the Keplar space telescope by measuring the amount of light that is blocked by a star as a planet moves in front of it. They have found thousands of such extrasolar planets and I have no doubt that the galaxy is home to billions of them waiting to be discovered. Millions of which, we conclude, will be in the habitable or goldilocks zones capable of supporting life. So let’s put this aside for a moment and talk about KIC 8462852. Let’s say, hypothetically, that the amount of dimming we are seeing WHICH IS HUGE (imagine that a Jupiter sized planet only blocks about 1% of the light from our own sun) is not from a natural phenomenon. Let’s say that it is not from an enormous debris field or cluster of rogue comets (which it probably is) BUT!!! let’s say that it’s not. Then what? Well, the megastructure theory, that was so keenly floating around is a fun one because it lets us explore another really cool idea. The idea of the Dyson Sphere. A theory which was put forward by Freeman Dyson, theoretical physicist and mathematician who put forward an idea that an advanced civilisation could utilise the power of their host star by building a sphere encompassing the entire system thus harnessing the power of the sun and having an inexhaustible supply of energy. SETI has submitted papers documenting these observations.
If it is mega-structure of some kind and no signals are being detected from it then it’s safe to assume that whomever or whatever built it is no longer around. Perhaps some cataclysmic event wiped out the inhabitants of that world or PERHAPS…. it was the Targlagdu! (read The Agathon for that reference) !!!.. 
Here’s a clip from Star Trek to explain Dyson Sphere’s
