photographic telescope वाक्य
उदाहरण वाक्य
मोबाइल
- In 1896 the observatory purchased their first photographic telescope, with a dome being built to house it between then and 1898.
- The observatory needed a dedicated amateur who would work long hours at low pay to operate its new photographic telescope and make long-exposure photographs of the sky.
- Fortunately he was using a photographic telescope, and was able to obtain some 500 exposures, as results from more traditional visual methods ( meridian line or micrometre measurements ) would have been far less conclusive.
- In 1896 she began working at Columbia University under Harold Jacoby and would publish her Ph . D . dissertation " Catalogue of stars within one degree of the North pole and optical distortion of the Helsingfors astro-photographic telescope deduced from photographic measures " there in 1900.
- Items on display include telescope models, measuring machines, altazimuth instruments by Dollond ( 1820 ) and Bamberg ( ca 1900 ), calculating machines, early office equipment, early electronic devices, lenses from early telescopes including the photographic telescopes of Gill, a clockwork telescope drive, a signal pistol, chemistry equipment etc.
- In 1939 the 30-inch reflector was replaced with a Ross photographic telescope and for more than ten years after that, 1939 through 1951 Baker used the observatory's photographic telescope to help count the stars in the Milky Way and determine their distribution as part of Harvard's Star Counting Circuit.
- In 1939 the 30-inch reflector was replaced with a Ross photographic telescope and for more than ten years after that, 1939 through 1951 Baker used the observatory's photographic telescope to help count the stars in the Milky Way and determine their distribution as part of Harvard's Star Counting Circuit.
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