gregorian telescope การใช้

• The telescope is named after James Gregory, the inventor of the Gregorian telescope.
• His design, the " Gregorian telescope ", however, remained un-built.
• He also made Gregorian telescopes with accurately shaped mirrors.
• He built some of the earliest Gregorian telescopes and observed the rotations of Mars and Jupiter.
• In early 2007, DFM Engineering began building a new clear aperture open frame, off-axis Gregorian telescope.
• The Steward Observatory Mirror Lab has been making mirrors for large Gregorian telescopes at least since 1985.
• Outside, another man trained his 6-inch Gregorian telescope on Jupiter, then Saturn, resting lower in the western sky.
• The James Gregory Telescope is named after the Scottish mathematician, astronomer and University academic James Gregory, who invented the Gregorian telescope.
• The Gregorian telescope design is rarely used today, as other types of reflecting telescopes are known to be more efficient for standard applications.
• In his 1663 " Optica Promota ", James Gregory described his reflecting telescope which has come to be known by his name, the Gregorian telescope.
• C-BASS North is a 6.1m Gregorian telescope, the dish was donated to the project by the Jet Propulsion Laboratory and it has started performing survey observations.
• His first major contribution to science was the comparison of the merits of the Cassegrainian and Gregorian telescopes; Kater determined the latter to be an inferior design.
• It would be ten years ( 1673 ), before the experimental scientist Robert Hooke was able to build this type of telescope, which became known Gregorian telescope.
• 50 years later, John Hadley developed ways to make precision aspheric and objective mirrors for reflecting telescopes, building the first parabolic Newtonian telescope and a Gregorian telescope with accurately shaped mirrors.
• Similarly, a Gregorian telescope from 1752 and a detailed moon globe from 1797 find links across the ages to the photographs on the wall above them _ digitalized NASA images from Michael Light's " Full Moon " collection.
• The 1.8 meter "'Alice P . Lennon Telescope "'and its "'Thomas J . Bannan Astrophysics Facility "', known together as the "'Vatican Advanced Technology Telescope "'( VATT ), is a Gregorian telescope observing in the infrared situated on Mount Graham in southeast Arizona, United States.
• The antennas for the ATA are 6.1 x 7.0 metres ( 20.0 ft x 23.0 ft ) hydroformed offset Gregorian telescopes, each with a 2.4 meter sub-reflector with an effective focal length / diameter ( f / D ) ratio of 0.65 . ( See DeBoer, 2001 ).
• An 18-foot crocodile sculpture that the architect Frank O . Gehry made for a trendy restaurant in Venice, Calif ., suddenly finds new meaning alongside a Gregorian telescope, which in turn makes sense of a delicate 1830s handbill about astronomical lectures found under the bed of Ricky Jay, the Hollywood actor and sleight-of-hand wizard.
• The design he came up with bears his name : the " Gregorian telescope "; but according to his own confession, Gregory had no practical skill and he could find no optician capable of realizing his ideas and after some fruitless attempts, was obliged to abandon all hope of bringing his telescope into practical use.