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Reflecting telescope

A reflecting telescope (also called a reflector) is a telescope that uses a single or a combination of curved mirrors that reflect light and form an image. The reflecting telescope was invented in the 17th century by Isaac Newton as an alternative to the refracting telescope which, at that time, was a design that suffered from severe chromatic aberration.

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Alhazen

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Astronomy

Astronomy is a natural science that studies celestial objects, such as stars, planets, comets, and galaxies, as well as the phenomena and processes that occur in outer space.

Galileo

Giant Magellan Telescope

The Giant Magellan Telescope (Giant Magellan or GMT) is a 25.

Gravity

Gravity is a natural phenomenon by which all things with mass or energy—including planets, stars, galaxies, and even light—are brought toward one another.

Hooker telescope

Hubble Space Telescope

The Hubble Space Telescope is a space-based observatory that has revolutionized the field of astronomy since its launch in 1990.