Forphys

History of Astronomy - Alex Friedmann

By forphysicstask
  • 100

    Ptolemy

  • 276

    Eratosthenes

  • 310

    Aristarchus of Samos

  • Feb 19, 1473

    Nicolaus Copernicus

  • Dec 15, 1546

    Tycho Brahe

  • Feb 15, 1564

    Galileo Galilei

  • Dec 27, 1571

    Johannes Kepler

  • Isaac Newton

  • Henrietta Leavitt

  • Albert Einstein

  • Alexander Friedmann

    Alexander Friedmann
    Alexander Alexandrovich Friedmann was born on June 16th 1888 and died September 16th 1925. He was Russian and was educated at Saint Petersburg State University. He used the astronomical model, with the sun as the centre. He developed the theory of the expanding universe. Here is a famous quote, “can expand, contract, collapse, and might even be born in a singularity.” He introduced the term ‘expanding universe” and came up with a set of equations. (Which can be seen in the picture).

  • 2nd Part Alex Freidmann

    Being born in 1888 he had access to telescopes, education, other scientist’s information (Such as Albert Einstein’s, Isaac Newton’s) and basic scientific technology.

  • Edwin Hubble

  • Aristotle

  • Hipparchus