As we explore microscopic nanotechnology, we should also consider the macroscopic "teratechnology." One such example of utilizing celestial bodies for technological purposes is to alter the trajectory of man-made projectiles, like that of satellites. Another might be the process of lensing, where intervening dark matter can be detected by virtue of its gravitational effect on distant light. Yet another is the plan to deflect meteors from crashing into earth. Can you think of any way we might manipulate astronomical objects - even create our own gravitational sources - to further practical applications of science, in analogy to how we have developed nanotechnology?