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Developed the law of universal gravitation and the three laws of motion.

Demonstrated the expansion of the universe.

Discovered that stars are composed mainly of hydrogen and helium.

Discovered the relation between the luminosity and the period of Cepheid variable stars.

Discovered the first radio pulsars in 1967.

Developed the Harvard Classification Scheme, organizing stars based on their temperatures.

Confirmed the existence of dark matter through her work on galaxy rotation rates.

Proposed the existence of dark matter and neutron stars.

Formulated the three laws of planetary motion.

Popularized science and astronomy through books and the television series 'Cosmos'.

Discovered the planet Uranus and infrared radiation.

Discovered cosmic radio waves and is considered the father of radio astronomy.

Pioneered techniques for the discovery of exoplanets in the region of their host stars known as the habitable zone.

Proposed the Big Bang theory of the origin of the universe.

Created a common designation system for stars and discovered the Horsehead Nebula.

Proposed the Heliocentric model of the universe.

Formulated the Chandrasekhar limit, the maximum mass of a stable white dwarf star.

One of the earliest known astronomers, credited with the invention of trigonometry.

Made precise astronomical observations that were the basis for Kepler's laws.

Made pioneering observations that supported the Copernican theory.

Known for discovering many trans-Neptunian objects (TNOs), including the dwarf planet Eris.

Predicted the return of the comet that was later named after him.

Provided the first empirical test of Einstein's theory of general relativity.

Discovered four moons of Saturn and the gap in Saturn's rings known as the Cassini Division.