The Contributors to Collective Learning

A timeline of remarkable scientists by Peter Del Re

Events

Nicolaus Copernicus is born

1473

Copernicus begins to question Geocentric Theory

1498

The Geocentric Theory is the theory that the Earth is the center of the universe

Copernicus writes "Little Commentary", a report on his personal research

1513

Copernicus writes "On the Revolutions of Celestial Spheres", a report on his Heliocentric Theory

1532

Heliocentric Theory is the theory that the sun is the center of the universe and that all the planets revolve around it

"On the Revolutions of Celestial Spheres" is published

1541

Copernicus dies, avoiding backlash for his theory

1543

This backlash would come from the Catholic Church, as they had widely accepted geocentrism at the time.

Isaac Newton and scholars finally accept Copernican Theory

1687

Dmitri Mendeleev is born

1834

Dmitri Mendeleev and his family face poverty

1848

Dmitri Mendeleev begins teaching in St. Petersburg

1861

Dmitri Mendeleev writes "Organic Chemistry", a textbook on modern organic chemistry.

1861

Dmitri Mendeleev begins work on organizing the elements

1867

Marie Curie is born

1867

Dmitri Mendeleev writes textbook on inorganic chemistry called "Principles of Chemistry"

1868 - 1870

Henrietta Leavitt is born

1868

Dmitri Mendeleev devises the Periodic Table of Elements

1869

Mendeleev finds a way to cohesively organize the elements into a table by discovering Periodic Law and applying that to the order of his elements.

Arthur Eddington is born

1882

Edwin Hubble is born

1889

Arthur Eddington begins to study the stars

1893

Marie Curie becomes the first woman to earn a degree in physics from the Sorbonne

1893

Wilhelm Roentgen discovers X-radiation, which becomes a catalyst for Marie Curie's work

1895

Marie Curie discovers Polonium and Radium, two highly radioactive elements

1898

Henrietta Leavitt discovers cepheid stars and develops luminosity theory

1902

Marie Curie separates a small amount of radium in a sample, another new discovery

1902

She found that energy radioactive elements gave off were actually tiny particles. This contradicted the widely held belief that atoms were solid and unchanging.

Marie Curie wins the Nobel Prize in Physics

1903

Dmitri Mendeleev is awarded the Copley Medal by the Royal Society of England

1905

Marie Curie's husband, Pierre Curie, dies

1906

Dmitri Mendeleev dies of influenza

1907

Henrietta Leavitt writes report on luminosity theory

1908

Marie Curie receives Nobel Prize in chemistry

1911

Marie Curie provides mobile X-Ray service for wounded soldiers in World War I.

1914

Radium Institute opens in Paris

1914

Arthur Eddington begins research on internal structure of stars

1916

Edwin Hubble earns PhD and a position at Mt. Watson Observatory

1917

Arthur Eddington uses observations to confirm Einstein's theory of relativity

1919

Einstein's theory of relativity is the theory that light bends due to gravity.

Henrietta Leavitt dies

1921

Edwin Hubble discovers the Andromeda Galaxy

1923

Arthur Eddington rejects Big Bang Theory in favor of Einstein's theories

1927

Edwin Hubble creates Hubble's Law

1929

Hubble's Law is the scientific law that the further away a galaxy is from ours, the faster it is compared to ours.

Arthur Eddington is knighted

1930

Marie Curie dies of leukemia

1934

Arthur Eddington dies

1944

Scientists discover element 96 and name it Curium after Marie Curie

1944

Edwin Hubble builds the Hale Telescope, which becomes the strongest telescope in the world

1948

Edwin Hubble dies

1953

Hubble's Hale Telescope is launched into space

1990