“Considering the possibilities of preserving the Earth during the Sun’s transition into a brighter and much larger object, the authors discuss alternatives like raising the Earth’s orbit to a safer distance or using a parasol to shield the planet from its rays. That might tide us over for a few billion years beyond the point where an unprotected Earth could survive as a habitable place. But the paper only begins here. After the sunshade, the authors go on to discuss their plan to create an artificial sun in the Kuiper Belt, where an Earth slowly moved into an outer orbit by gravitational swing-by techniques can eventually find its new home in a stable orbit around a life-giving source of heat and light. Call it an ArtSun, as they do, and ponder how much science fiction it might inspire.”
via Centauri Dreams.