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Subject:
From:
"Glenn A. Walsh" <[log in to unmask]>
Reply To:
Museum discussion list <[log in to unmask]>
Date:
Sat, 21 Oct 2023 05:22:13 +0000
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Centennial: Projection Planetarium

Today (2023 October 21) marks the centennial of the planetarium projector, which made its debut at the Deutsches Museum in Munich, Germany on 1923 October 21. This means of displaying the motions of the Sun, Moon, planets, and stars of the sky, without any concern for inclement weather, quickly developed in cities around the world.

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Link >>> https://spacewatchtower.blogspot.com/2023/10/centennial-projection-planetarium.html

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Centennial: Projection Planetarium

These photographs show the two earliest versions of the Zeiss Planetarium Projector. The first image, on the lef...
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gaw
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 Glenn A. Walsh, Informal Science Educator & Communicator,
Friends of the Zeiss < http://friendsofthezeiss.org >
Electronic Mail - < [log in to unmask] >
SpaceWatchtower Blog: < http://spacewatchtower.blogspot.com/ >

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