Hale Telescope mirror.. It was completed in 1948 and is still in active use. The Hale Telescope represented the technological limit in building large optical telescopes for over 30 years. It was the largest telescope in the world until the Russian BTA-6 was built in 1976, and the second largest until the construction of the Keck Observatory Keck 1 in 1993. Hale supervised the building of the telescopes at the Mount Wilson Observatory with grants from the Carnegie Institution of Washington: the telescope in 1908 and the telescope in 1917. These telescopes were very successful, leading to the rapid advance in understanding
WorldWide Telescope The WorldWide Telescope program makes use of IVOA standards for inter-operating with data providers to provide its image, search and catalog data. Rather than concentrate all data into one database, the WorldWide Telescope sources its data from all over the web and the available content grows as more VO compliant data sources are placed on the web. The WorldWide Telescope Windows client application supports both single and multichannel full-dome video projection allowing it to power full dome digital planetarium systems. It is currently installed in several world-class planetariums where it runs on turn-key planetarium system. It can also be used