Astronomy and Telescopes

Ptolemy

100

Ptolemy created the geocentric theory. This stated that the Earth was in the center of the Universe and the planets and stars sun around it. His theory lasted for 1500 years.

Nicolaus Copernicus

Jan 1, 1473

Nicolaus Copenicus believed in his heliocentric theory that the sun was in the center and all of the plantes orbited the sun in exact circles.

Tycho Brahe

Jan 1, 1546

Tycho Brahe believed that the sun and moon revolves around the earth and the rest of the planets revolve around the sun.

Galileo Galilei

Jan 1, 1564

Galileo Galilei was one of the first people to use a telescope and observe space objects.

Johannes Kepler

Dec 27, 1571

Johanes Kepler concluded that the planets revolve around the sun but the sun is not in the exact center. He also stated three laws.

Spyglass Invention

Jan 1, 1608

Hans Lippershey, from Holland, created the spyglass in 1608. This was a very important part of the development of the telescope.

First Reflecting Telescope

Jan 1, 1668

In 1668 Isaac Newton, from the United Kingdon, was credited with building the first reflecting telescope. Today this invention is known as the Newtonian telescope.

Silver on glass

Jan 1, 1850

In the 1850s Germany scientists made a chemical reaction on glass and they created silver on it.

First Radio Telescope

Jan 1, 1937

In 1937 Grote Reber, born in Wheaton, Illinois, was know for constructing the first radio telescope right in his back yard.

Hubble Space Telescope

Apr 24, 1990

The Hubble Space Telecope was launched into Earth's orbit at a low height that is only 347 miles up. The building and launching of this instrument cost 2.5 billion dollars.