When arriving at a wanted final position, such as orbiting Earth or Sol, a new telescope from the telescopes making asteroid will use its included ion jet to achieve its preferred orbit. It can then most efficiently have its viewing direction finely readjusted by exploiting the very weak radiation pressure from Sol's light on 2 energy film disks stuck out from the telescope. Also they would feel very slight force when halting some virtually vacuum hot gas jet & ion streams from Sol. Tilting the disks lets them weakly act like sails. Or adjusting their angles and distances stuck out from the telescope will let telescope aiming directions get slowly changed. Read more »