He also made Gregorian telescopes with accurately shaped mirrors.

The Gregorian telescope design is rarely used today, as other types of reflecting telescopes are known to be more efficient for standard applications.

James Gregory is the inventor of the Gregorian telescope.

Gregorian telescope is a type of telescope.

James Short's circa 1750 Gregorian telescope variation designed to read the separation of binary stars.

His great-great-grandfather James Gregory, the mathematician, designed the Gregorian telescope.

In one corner of the dining-room, on its tripod, sat the old Gregorian telescope which I had brought from my parents' home-a simple.

The overall focal ratio is f/8 and the optical prescription is an aplanatic gregorian telescope.

The Steward Observatory Mirror Lab has been making mirrors for large Gregorian telescopes at least since 1985.

James Gregory publishes Optica Promota, describing the Gregorian telescope.

In the 'Optica Promota' Gregory described his design for a reflecting telescope, the "Gregorian telescope".

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.

In his 1663 Optica Promota, James Gregory described his reflecting telescope which has come to be known by his name, the Gregorian telescope.

The Gregorian telescope is named after the James Gregory design which appeared in his 1663 publication Optica Promota (The Advance of Optics).

He described an early practical design for the reflecting telescope - the Gregorian telescope - and made advances in trigonometry, discovering infinite series representations for several trigonometric functions.

In doing so, he was following the method described by James Gregory in Optica Promota (in which the design of the Gregorian telescope is also described).

The James Gregory Telescope is named after the Scottish mathematician, astronomer and University academic James Gregory, who invented the Gregorian telescope.

He built some of the earliest Gregorian telescopes, observed the rotations of Mars and Jupiter and, based on his observations of fossils, was an early proponent of biological evolution.

He fist tried making his mirrors out of glass as suggested by Gregory, but he later switched to speculum metal mirrors creating Gregorian telescopes with original designers parabolic and elliptic figures.

The Gregorian telescope is a type of reflecting telescope designed by Scottish mathematician and astronomer James Gregory in the 17th century, and first built in 1673 by Robert Hooke.

The telescope is a 10 meter (394 in) off-axis Gregorian telescope in an altazimuth mount (at the poles, an altazimuth mount is effectively identical to an equatorial mount).

Hadley also developed ways to make precision aspheric and parabolic objective mirrors for reflecting telescopes, building the first parabolic Newtonian telescope and a Gregorian telescope with accurately shaped mirrors.

One of the earliest designs, James Gregory's Gregorian telescope could not be built because Gregory could not find a craftsman capable of fabricating the complex speculum mirrors needed for the design.

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 actually constructing one.

Namely, it consists of an open 3He-4He dilution cryostat cooling spiderweb-type bolometers at 100 mK; cold individual optics with horns at different temperature stages (0.1, 1.6, 10 K) and an off-axis Gregorian telescope.