[PAR] [TLE] Gregorian telescope [SEP] 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.  James Gregory was a contemporary of Isaac Newton, both often worked simultaneously on similar projects.  Gregory's design was published in 1663 and pre-dates the first practical reflecting telescope, the Newtonian telescope, built by Sir Isaac Newton in 1668.  However, Gregory's design was only a theoretical description and he never actually constructed the telescope.  It was not successfully built until five years after Newton's first reflecting telescope. [PAR] [TLE] Robert Hooke [SEP] Robert Hooke FRS ( ; 28 July [O.S. 18 July] 1635  – 3 March 1703) was an English natural philosopher, architect and polymath.
[PAR] [TLE] Gregorian telescope [ SEP ] 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 . James Gregory was a contemporary of Isaac Newton , both often worked simultaneously on similar projects . Gregory 's design was published in 1663 and pre - dates the first practical reflecting telescope , the Newtonian telescope , built by Sir Isaac Newton in 1668 . However , Gregory 's design was only a theoretical description and he never actually constructed the telescope . It was not successfully built until five years after Newton 's first reflecting telescope . [PAR] [TLE] Robert Hooke [ SEP ] Robert Hooke FRS ( ; 28 July [ O.S. 18 July ] 1635 – 3 March 1703 ) was an English natural philosopher , architect and polymath .
English architect and polymath Robert Hooke was the first to build the Gregorian telescope invented by which Scottish mathematician?
English architect and polymath Robert Hooke was the first to build the Gregorian telescope invented by which Scottish mathematician ?
James Gregory
James Gregory