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Claudius Ptolemy
Claudius Ptolemy Egyptian astronomer, mathematician, and geographer of Greek descent who flourished in Alexandria during the 2nd century CE. In several fields, his writings represent the culminating achievement of Greco-Roman science, particularly his geocentric (Earth-centred) model of the universe now known as the Ptolemaic system. -
1514
Nicolaus Copernicus
Nicolaus Copernicus proposed that the sun was stationary in the centre of the universe and the earth revolved around it. -
Galileo Galilei
Galileo Galilei Italian natural philosopher, astronomer, and mathematician who made fundamental contributions to the sciences of motion, astronomy, and strength of materials and to the development of the scientific method. His formulation of (circular) inertia, the law of falling bodies, and parabolic trajectories marked the beginning of a fundamental change in the study of motion. -
Johannes Kepler
Johannes Kepler German astronomer who discovered three major laws of planetary motion, conventionally designated as follows: (1) the planets move in elliptical orbits with the Sun as one; (2) the time necessary to traverse any arc of a planetary orbit is proportional to the area of the sector between the central body and that arc the “area law”. (3) there is an exact relationship between the squares of the planets’ periodic times and the cubes of the radii of their orbits the “harmonic law". -
Edmond Halley
Edmond Halley English astronomer and mathematician who was the first to calculate the orbit of a comet later named after him. -
William Herschel
William Herschel German-born British astronomer, the founder of sidereal astronomy for the systematic observation of the heavens. He discovered the planet Uranus, hypothesized that nebulae are composed of stars, and developed a theory of stellar evolution. -
Discovery of the first four asteroids
The names of the first four asteroids ever discovered are Ceres, Pallas, Juno and Vesta. -
Urbain Le Verrier
Urbain Le Verrier was an astronomer who discovered the planet Neptune by using math -
Clyde Tombaugh
Clyde Tombaugh, American astronomer who discovered Pluto in 1930 after a systematic search for a ninth planet instigated by the predictions of other astronomers. He also discovered several clusters of stars and galaxies, studied the apparent distribution of extragalactic nebulae, and made observations of the surfaces of Mars, Venus, Jupiter, Saturn, and the Moon. -
Voyagers 1
Voyager 1 is a space probe that was launched by NASA -
Voyager 2
Voyager 2 is a space probe that was launched by NASA