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Home > All Images > 1998 > February > 17 Feb 1998

Images Dated 17th February 1998

Choose from 18 pictures in our Images Dated 17th February 1998 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.

Checking the mirror for Large Binocular Telescope Featured 17 Feb 1998 Print

Checking the mirror for Large Binocular Telescope

LBT mirror. Researcher Roger Angel with the mirror for the Large Binocular Telescope (LBT). This 8.4- metre telescope mirror is the largest ever cast. The mirror's borosilicate glass has a honeycomb design which makes it strong but light. It was cast by a process of melting, moulding & spinning in a rotating oven. The mirror is then finely polished. Two identical mirrors will be placed on a common mount in the LBT constructed on Mount Graham in Arizona, USA. Together they will have the light-collecting power and image sharpness of a much larger single mirror. Roger Angel is director of the University of Arizona Mirror Laboratory in Tucson, USA. Photographed in 1997