james gregory was the british architect physicist chemist and inventor who built the first gregorian telescope.
james gregory was the british architect physicist chemist and inventor who built the first gregorian telescope.
british architect physicist chemist and inventor who built the first gregorian telescope?
james gregory
gregorian telescope









































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.









































section::::history.
gregorian telescope
for amateur telescope makers the gregorian can be less difficult to fabricate than a cassegrain because the concave secondary is foucault testable like the primary, which is not the case with the cassegrain's convex secondary.









































section::::examples.









































bullet::::- the meerkat, the green bank telescope, the arecibo observatory, and the allen telescope array are all radio telescopes employing off-axis gregorian optics.









































bullet::::- the vatican advanced technology telescope, the magellan telescopes, and the large binocular telescope use gregorian optics.









































bullet::::- the giant magellan telescope will also use gregorian optics.









































section::::see also.









































bullet::::- list of telescope types









































bullet::::- gregor telescope at the teide observatory.
gregorian telescope