Roll-up space telescope mirrors
ASTRONOMY | Researchers have developed a technique to produce flexible, high-quality
mirrors for space telescopes. The mirrors could be rolled up and stored compactly in
rockets and enable more-powerful orbiting observatories. A team at the Max Planck
Institute for Extraterrestrial Physics created prototypes up to 30 centimeters wide and
plans to make larger ones. The mirrors are made by rotating liquid in a vacuum chamber
as a parabolic “mold,” onto which chemical vapors are deposited to form a polymer layer.
A reflective metal layer is then added. They described the work in Adaptive Optics.

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