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Refracting telescope

Adapted from Wikipedia · Explorer experience

Diagram showing the parts of a Keplerian refracting telescope

What is a Refracting Telescope?

A refracting telescope is a special kind of telescope that uses a lens to make things look bigger and clearer. It was one of the first telescopes ever made and helped people see faraway stars and planets. These telescopes have a lens at the front, a long tube, and an eyepiece at the back where you look through.

A Long Time Ago

The very first refracting telescopes were made around 1608 in the Netherlands. A man named Hans Lippershey tried to get a special right to make them, but others soon built their own. Later, a famous scientist named Galileo Galilei heard about these telescopes. He made his own and used it to discover amazing things about space, like the moons of Jupiter.

How It Works

Refracting telescopes use two main parts: an objective lens and an eyepiece. The big lens at the front bends light to create a sharp picture. The eyepiece then makes that picture larger so you can see it better. Some telescopes show things right-side up, while others show them upside down.

Big and Beautiful

In the 1800s, many big refracting telescopes were built. They helped scientists learn about stars, planets, and faraway objects in space. Even though most big telescopes today use mirrors instead of lenses, refracting telescopes are still loved for their clear views. They were very important for making many wonderful discoveries about our universe.

Images

A large refracting telescope used for astronomy research at Cornell University's Fuertes Observatory.
The Crab Nebula is the glowing remains of a star that exploded long ago, creating beautiful colorful clouds of gas in space.
Diagram showing how a Galilean telescope works – a great invention from the past that helped us study the stars!
An old scientific drawing of a telescope from a 17th-century astronomy book.
The 28-inch refractor telescope at the Royal Observatory in Greenwich, one of the largest of its kind in the world.
Albert Einstein and staff at Yerkes Observatory in front of a large telescope in 1921.
The Great Refractor telescope at the Astrophysical Observatory in Potsdam, Germany, a giant instrument used for studying the stars and planets.
A spyglass located in Zermatt, offering views of the majestic Matterhorn mountain.
A large telescope used for observing stars and planets at the University of Vienna's observatory.
An old refracting telescope by Zeiss, on display at the Astronomical Observatory of Adam Mickiewicz University in Poznań.
An artist's rendering of HE 1523-0901, one of the oldest known stars in our galaxy, located about 7,500 light-years from Earth.

Related articles

Eyepiece
Netherlands
Hans Lippershey
Galileo Galilei
Objective (optics)
Light

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