[petuniasevan]

Each Keck mirror is made of 36 pieces, each just six feet across, fitted together like bathroom tiles.

Hey, with some epoxy and a few mirrored tiles I'll bet you can upgrade that 10" 'scope to a 10-foot lightbucket in NO TIME! ;>D

[Gorzaloon]

SO those are either adaptive optics, or most of them had to be off-axis parabolas..either way, a marvel.

(Gorzaloon, tiny, but <1/8 wave!)