What is the history of Astronomy? What are major discoveries?

Astronomy is an ancient science that has been studied by civilizations around the world for thousands of years.

In the 17th century, Galileo Galilei made the first observations of the Moon and planets using a telescope, revolutionizing our understanding of the universe.

In the 19th century, German astrophysicist Friedrich Wilhelm Bessel was the first to measure the distance to a star.

In the early 20th century, Edwin Hubble discovered that the universe was expanding.

In the 1940s, the development of radio astronomy allowed astronomers to study stars, galaxies, and other celestial objects that were invisible in the optical spectrum.

In the 1950s, the Big Bang theory was proposed to explain the origin of the universe.

In the 1970s, the first exoplanets were discovered, opening up a new field of astronomy.

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