Telescope

A telescope is an instrument that makes distant objects appear larger and closer, most famously used to observe the stars and planets.

How it works

Telescopes gather and focus light using lenses or mirrors. The more light they collect, the fainter and farther the objects they can reveal.

In astronomy

Galileo Galilei was among the first to study the sky with a telescope. Modern giant telescopes on the ground and in space, such as Hubble, have transformed our understanding of the universe.

Frequently asked questions

What is a telescope used for?

To observe distant objects, especially in space.

How does a telescope work?

By gathering and focusing light with lenses or mirrors.