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Period: 100 BCE to 160 BCE
Claudius Ptolemy
He discovered geocentric that Earth is the center of the universe. -
Period: 1473 to 1543
Nicolaus Copernicus
The geocentric theory was first proposed by Copernicus. -
Period: 1473 to 1543
Nicolaus Copernicus
Having computed the orbit of the famous Halley's Comet (named after him). -
Period: 1564 to
Galileo Galilei
Galileo Galilei published a book that stated, among other things, that the heliocentric theory of Copernicus was correct. -
Period: 1571 to
Johannes Kepler
Johannes Kepler improved the heliocentric theory of Nicolaus Copernicus -
Period: to
Edmond Halley
Having computed the orbit of the famous Halley's Comet (named after him). -
Period: to
William Herschel
William Herschel discovered the planet Uranus and several moons around other gas giants. -
Period: to
the first asteroid
Giuseppe Piazzi accidentally discovered the first and largest asteroid, Ceres. -
the second asteroid
Pallas, minor-planet designation 2 Pallas, is the second asteroid to have been discovered (after Ceres), -
the third asteroid
It was discovered by Karl Ludwig Harding. -
the fourth asteroid
it was by Heinrich Wilhelm Matthias Olbers -
Period: to
Urbain Le Verrier
Urbain Le Verrier discovered the planet, Neptune. -
Period: to
Clyde Tombaugh
He discovered Pluto. -
Voyagers 2
Voyager 2 is a space probe launched by NASA. -
Period: to
Voyagers 1
Voyager 1 is a space probe launched by NASA