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ancient astronomers
alan dyer
annie maunder
christiaan huygens
claudius ptolemy
fred hoyle
fritz zwicky
galileo galilei
georges lemaitre
gerard kuiper
giovanni schiaparelli
jan hendrik oort
johann encke
john goodricke
michel g.e. mayor
paul hickson
philibert j. melotte
shirin haque
terence dickinson
vera rubin

Tycho Brahe

Tycho Brahe (1546-1601)

A Dane, Brahe made important contributions to Astronomy by devising the most precise instruments for observing the motions of planets, before the invention of telescopes. Later, Brahe’s extensive data on Mars was crucial to Johannes Kepler in his formulation of the laws of planetary motion, because Brahe’s data was sufficiently precise to demonstrate that the orbit of Mars was not a circle but an ellipse.

Charles Messier

Charles Messier (1730-1817)

The tenth of twelve children born to wealthy parents in Badonviller, France, Charles Messier was an astronomer most notable for publishing an astronomical catalogue consisting of nebulae and star clusters which came to be known as the 'Messier objects'.

Edwin Hubble

Edwin Hubble (1889-1953)

Renowned for determining that there are other galaxies in the Universe beyond the Milky Way, Edwin Powell Hubble also observed that the universe is not static, but expanding at a constant rate. He is regarded as one of the most influential astronomers of the 20th Century.

Carl Sagan

Carl Sagan (1934-1996)

Born in New York City, USA, Sagan was an astronomer, cosmologist, astrophysicist, astrobiologist, author, science popularizer, and science communicator in Astronomy and other natural sciences. One of his most memorable books was Pale Blue Dot.