Giant Furnace Opens to Reveal 'Perfect' LSST Mirror Blank

(PhysOrg.com) -- The single-piece primary and tertiary mirror blank cast for the LSST is "perfect", say project astronomers and engineers.

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<p><a href="http://www.physorg.com/news139583107.html">Giant Furnace Opens to Reveal 'Perfect' LSST Mirror Blank</a></p> <p>(PhysOrg.com) -- The single-piece primary and tertiary mirror blank cast for the LSST is "perfect", say project astronomers and engineers.</p>