Everything about The Hale Telescope totally explained
The
Hale Telescope is the largest telescope at the
Palomar Observatory. The 200-inch (5-m), f 3.3 telescope is named after
George Ellery Hale. Hale supervised the building of the telescopes at the
Mount Wilson Observatory with grants from the
Carnegie Institution of Washington: the 60-inch (1.5 m) telescope in 1908 and the 100-inch (2.5 m) telescope in 1917. These telescopes were very successful, leading to the rapid advance in understanding of the scale of the
Universe through the
1920s, and demonstrating to visionaries like Hale the need for even larger collectors.
In 1928 Hale secured a grant of
US$6 million from the
Rockefeller Foundation for "the construction of an observatory, including a 200-inch reflecting telescope" to be administered by the
California Institute of Technology (Caltech), of which Hale was a founding member. In the early 1930s, Hale selected a site at 1,700 m (5,600 feet) on
Palomar Mountain in
San Diego County, California, USA as the best site, and less likely to be affected by the growing light pollution problem in urban centers like
Los Angeles. The
Corning Glass Works was assigned the task of making a 200-inch mirror out of a new glass blend called
Pyrex. Construction of the observatory facilities and dome started in 1936, but because of interruptions caused by
World War II, the telescope wasn't completed until 1948.
The Hale 200-inch remained the largest operating telescope in the world until
BTA-6 became operational in the early
1980s.
It continues to be used every clear night for scientific research by astronomers from Caltech and their operating partners,
Cornell University, The
University of California, and the
Jet Propulsion Laboratory. It is equipped with modern optical and infrared array imagers, spectrographs, and an
adaptive optics system.
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