With another dab of polish I set to work wiping the entire surface, right up to the curves of the frame.

NEWYORKER: Miracle Polish

Though that also makes it more flexible (and makes the ability to grind and polish the glass to create a light-capturing parabolic surface without actually breaking the thing all the more impressive), this flexibility can be exploited to keep the reflective surface in shape.

ECONOMIST: Japan��s new telescope