Well, any of us who has ever looked through a telescope could say the same, for the two principal types in use today were developed by giants: the refractor by Galileo and the reflector by Newton.

The first telescopes refracted light, and today reflectors dominate, but there is a third way to make light focus, and it ...

The Newtonian reflecting telescope has been in use for centuries since its invention by Isaac Newton in 1668. Unlike refracting telescopes (whose lenses are very expensive), the Newtonian ...

It was soon realized that what was to become known as chromatic aberration was a limiting factor in refracting telescopes, and that this could be overcome by making lenses with longer focal length ...

However, in most cases, such an advertised magnification is well beyond the practical maximum magnification of the telescope. A 2.4-inch refracting telescope, for example, should never use more ...

The Archenhold Observatory's refracting telescope is a full 21 meters long. Looking through the powerful refractor opens up ...

McKim Observatory still houses many of its original instruments, including a 9.53 inch Clark Refractor telescope, a meridian transit telescope, and a gravity driven chronograph. Missing from the early ...

FitzRandolph Observatory is located on the campus of Princeton University in Princeton, New Jersey. FitzRandolph Observatory was constructed in 1934 to replace the Halsted Observatory. In 1966, a 36" ...