Membrane mirrors show promise: https://physicsworld.com/a/membrane-mirrors-take-off-for-use-in-large-space-telescopes/ https://physicsworld.com/a/membrane-mirr

Membrane mirrors show promise: https://physicsworld.com/a/membrane-mirrors-take-off-for-use-in-large-space-telescopes/ https://physicsworld.com/a/membrane-mirrors-take-off-for-use...