## 1894 – Lemaitre – bio

George Lemaitre was born in 1894 in Belgium and was an astronomer and physicist who became known for promoting the theory of an expanding universe. In 1927, he published an article titled, “A Homogeneous Universe of Constant Mass and Increasing Radius accounting for the Radial Velocity of Extra Galactic Nebulae”, which used the relativity equations of Einstein to create a model of the universe. The equations described an expanding universe and an associated “red shift” which was confirmed by observational data two years later from Edwin Hubble. This evolved into what is known as “The Big Bang Theory” when Lemaitre extended the theory backwards in time to a “zero state” beginning.

PRECURSOR:

**-0325 – Euclid**

**1608 – Telescope**

**1768 – Fourier**

**1777 – Gauss**

1842 – red shift – Doppler

**1853 – Lorentz**

CONCURRENT:

1868 – Hale

1868 – Millikan

1875 – Slipher

**1879 – Einstein**

1881 – Tolman

1882 – Eddington

1885 – Shapley

1888 – Friedmann

1889 – Hubble

1903 – Robertson

1906 – Godel

1909 – Walker

SUBSEQUENT:

1910 – Chandrasekhar

1915 – Hoyle

1915 – Tukey

1919 – Bondi

1926 – Cooley

1929 – Ehlers

1932 – Sachs

1947 – Guth

1948 – Linde