Looks over at an old copy of Ringworld on the shelf and wonders what kind of imaging one could do of neighboring star systems if you put mirrors around the edge of the ring.
We sort of do that with radiotelescopes, we place them all over the world and combine the signals, analogously to them being part of one primary mirror.
We also take images when the Earth is at opposite ends of its orbit and combine those.
Good reason to check your fly is zipped before you walk outside.
Use the sun as a lens and you won't need a megastructure.
It’s gravity is too weak. It only deflects stars optically near the edge of the corona by a very small amount.