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2. Mirror armour - Wikipedia

   en.wikipedia.org/wiki/Mirror_armour

   Mirror armour (Russian: зерцало, zertsalo, meaning "mirror"; Chinese: 护心镜, hùxīnjìng, meaning "protect-heart mirror"), sometimes referred to as disc armour or as chahār-āyneh or char-aina (Persian: چهاﺮآﻳنه meaning "four mirrors"; whence Kazakh: шар-айна, şar-ayna), was a type of cuirass used mainly in Asia ...

3. List of largest optical reflecting telescopes - Wikipedia

   en.wikipedia.org/wiki/List_of_largest_optical...

   This table does not include all the largest mirrors manufactured. The Steward Observatory Mirror Lab produced the 6.5 metre f/1.25 collimator used in the Large Optical Test and Integration Site of Lockheed Martin, used for vacuum optical testing of other telescopes. Segmented mirrors are also referred to as mosaic mirrors. Single mirrors are ...

4. Zerodur - Wikipedia

   en.wikipedia.org/wiki/Zerodur

   In 1966, Hans Elsässer, the founding director of the Max Planck Institute for Astronomy (MPIA), asked the company if it could produce large castings of almost 4 meters using low-expansion glass-ceramic for telescope mirror substrates. In 1969, the MPIA ordered a 3.6 m (12 ft) mirror blank, along with ten smaller mirror substrates.

5. List of largest optical refracting telescopes - Wikipedia

   en.wikipedia.org/wiki/List_of_largest_optical...

   This list includes some additional examples, such as the Great Paris telescope, which also used a mirror, and some solar telescopes which may have more complicated optical configurations. The SST has an optical aperture of 98 cm (39.37"), although the lens itself is 110 cm (43.31").

6. Segmented mirror - Wikipedia

   en.wikipedia.org/wiki/Segmented_mirror

   Segmented mirrors are typically hexagonal and arranged in a honeycomb pattern. A segmented mirror is an array of smaller mirrors designed to act as segments of a single large curved mirror. The segments can be either spherical or asymmetric (if they are part of a larger parabolic reflector [1]). They are used as objectives for large reflecting ...

7. Is Alzheimer's linked to the cold-sore-causing herpes virus?

   www.aol.com/alzheimers-linked-cold-sore-causing...

   The virus causing cold sores may also be linked to Alzheimer’s risk, a new study suggests. Image credit: alvaro gonzalez/Getty Images. This article originally appeared on Medical News Today