Atlantis Arisen
March 29, 2024, 02:22:58 am
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Sprawling Angkor Brought Down by Overpopulation, Study Suggests
http://news.nationalgeographic.com/news/2007/08/070813-angkor-wat.html
 
  Home Help Search Arcade Links Staff List Login Register  

Planetariums

Pages: [1] 2 3   Go Down
  Print  
Author Topic: Planetariums  (Read 2334 times)
0 Members and 20 Guests are viewing this topic.
Majir
Atlantean Hero
*****
Posts: 115



View Profile
« on: April 25, 2011, 01:27:26 pm »

Armand Spitz recognized that there was a viable market for small inexpensive planetariums. His first model, the Spitz A, was designed to project stars from a dodecahedron, thus reducing machining expenses in creating a globe. Planets were not mechanized, but could be shifted by hand. Several models followed with various upgraded capabilities, until the A3P, which projected well over a thousand stars, had motorized motions for latitude change, daily motion, and annual motion for Sun, Moon (including phases), and planets. This model was installed in hundreds of high schools, colleges, and even small museums from 1964 to the 1980s.

 
A Goto E-5 projector.Japan entered the
Report Spam   Logged


Pages: [1] 2 3   Go Up
  Print  
 
Jump to:  

Bookmark this site! | Upgrade This Forum
SMF For Free - Create your own Forum

Powered by SMF | SMF © 2016, Simple Machines
Privacy Policy