Solar storms that fling magnetism across the solar system can knock out satellites, power grids, communication and navigation systems, and endanger astronauts in space. Scientists can observe these ...

A new summer exhibition in the First Floor Gallery of the Albert and Shirley Small Special Collections Library explores the ...

Yerkes Observatory near Lake Geneva is more than 125 years old, is the site of numerous scientific discoveries, is home the world's largest refracting telescope and has been visited by the likes ...

Pope Leo XIV looks through the main telescope of the Vatican Observatory in Castel Gandolfo, Italy, alongside U.S. Jesuit Father ...

Compound, or catadioptric, telescopes combine lenses and mirrors for a compact option, suitable for both planetary and ...

Lick Observatory was completed in 1888 and quickly established itself as a leader in astronomical research. At its heart was the 36-inch Great Lick Refractor, which was once the world’s largest ...

The refracting telescope is believed to have been used by Lassell on a trip to Spain to observe a solar eclipse in July 1860.

It was the first permanently staffed mountain-top observatory and the 36-inch Great Refractor was the world’s largest refracting telescope and continued to be a premier research telescope for half a ...

Uh, the older telescopes often used big lenses and, uh, often antique telescope enthusiasts focus on lens type or refracting telescopes.

A 2.4-inch refracting telescope, for example, should never use more than 120-power magnification (the general rule of thumb is 50-power per inch of aperture).

With a 90mm aperture and 800mm focal length, this refractor telescope offers a crystal-clear view of the night sky, perfect for both budding astronomers and seasoned stargazers.