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Lick telescope

astronomy
The James Lick Telescope

The James Lick Telescope

Harald Sack
On January 3, 1888, the James Lick Telescope saw first light at the Lick observatory, San Jose, USA. The Lick telescope is a refracting telescope with a lens 91 cm in diameter – a major achievement in its day and in its time the largest telescope in the world until 1897. The instrument remains in operation and public viewing is allowed on a limited basis. A lot of astronomical discoveries have been made…
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astronomy
Joseph von Fraunhofer and the Solar Spectrum

Joseph von Fraunhofer and the Solar Spectrum

Harald Sack
On March 6, 1787, German optician and physicist Joseph Fraunhofer – later enobled Ritter von Fraunhofer – was born. He is known for the discovery of the dark absorption lines known as Fraunhofer lines in the Sun‘s spectrum, and for making excellent optical glass and achromatic telescope objectives. Moreover, he is the name giver for the German Fraunhofer Society for the advancement of applied research. “In all my experiments I could, owing to…
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