The casting of the secondary mirror blank for ESO’s Extremely Large Telescope (ELT) has been completed by SCHOTT at Mainz, Germany. The completed mirror will be 4.2 metres in diameter and weigh 3.5 tonnes. It will be the largest secondary mirror ever employed on a telescope and also the largest convex mirror ever produced.
Het persbericht, de afbeeldingen en de video's zijn te vinden op:
http://www.eso.org/public/news/eso1715/
Met vriendelijke groet,
Dr. Rodrigo Alvarez
ESON Belgium
Planetarium, Royal Observatory of Belgium
eson-belgium@eso.org
22 mei 2017
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