An Iridium flare gleams above the dome of the Isaac Newton Telescope on the 50th anniversary of its inauguration in this photo by Miguel Claro.

Isaac Newton worked at the Royal Society, and the organization has kept since 1688 the original telescope that Newton himself built. Watch the video to understand a nice bit of chemistry as well.

These replicas, made in 1923 and 1924, are of telescopes invented by Galileo in c 1609 and Sir Isaac Newton in 1668. Galileo’s telescope (right) uses lenses to magnify about 21 times but gives ...

1672: Sir Isaac Newton’s reflecting telescope Sketch of Newton’s telescope. Image Source: Library of Congress Washington, D.C. 20540 USA. Digital ID: ...

The invention of the reflector telescope stretches back to Isaac Newton in the 17th Century. Typically, the reflecting telescope allows for larger apertures. This means a greater amount of light ...

SIR HAROLD SPENGER JONES, Astronomer Royal, has recently spent three months in the United States, at theinvitation ofmany American astronomers, in course whichhe visited most of the astronomical ...

Via astronomer Salman Hameed at Irtiqa, this encouraging item from the Express Tribune about a young student in Okara, Pakistan, who built his own Newtonian telescope from scratch. A childhood ...

The Isaac Newton Group of Telescopes is completing a strategic change for the scientific use of its two telescopes, the 4.2-m William Herschel Telescope (WHT) and the 2.5-m Isaac Newton Telescope ...

A short history of Sir Isaac Newton, the mathematician and physicist that helped invent and explain some of the most fundamental laws of science. When you purchase through links on our site, we ...

The copy of Isaac Newton's seminal treatise Opticks that he had purchased some 20 years before turned out to be from Newton's own personal library, believed lost for many decades.

Today animated apples are tumbling on Google—a birthday tribute to Isaac Newton, father of gravitational theory and so much more. Find out why he still matters.