If aliens harnessed solar power, could we detect them? NASA investigated.

Somewhere in the galaxy, an advanced alien civilization might harness energy from its star. And NASA wants to know if it could detect this activity.The space agency has some powerful telescopes — and it's building more. As scientists increasingly peer at other rocky, Earth-like worlds, they evaluated whether it's possible to pick up signs of widespread solar farms on such distant planets. After all, an extraterrestrial society will need power, and a sun-like star provides nearly inexhausti