2.5 Changing Timelines Grace Mills

Timeline created by glmil316
In History
  • -276 BCE

    Eratosthenes Born

  • -236 BCE

    Erastathones Becomes Chief Librarian of Library of Alexandria

  • -194 BCE

    Erastathones Dies

  • 85

    Ptolemy is Born

    Ptolemy is born in Alexandria, Egypt
  • 165

    Ptolemy Dies

    In his lifetime, Ptolemy developed the geocentric theory through the usage of evidence such as epicycles and observations made from the human eye.
  • Feb 19, 1473

    Copernicus is Born

  • 1492

    Copernicus Attends Krakow University

    During this time, Copernicus studies math, Greek, and Islamic astronomy, expenses being paid for by his wealthy uncle. At Krakow, Copernicus begins to question the validity of Aristotle and Ptolemy's view of the geocentric Universe. He became increasingly aware of the contradictions between the planets being concentric spheres yet having eccentric orbits.
  • 1501

    Copernicus Attends Padau University

    While attending Padau University, Copernicus develops some evidence for a new system of cosmology that differs from the geocentric theory,
  • 1503

    Copernicus Continues to Gather Evidence

    From 1503 to 1510, Copernicus works for his uncle, which gave him lots of free time to continue to make observations on the cosmos. This allowed him to further develop his theory on the layout of the universe.
  • 1510

    Copernicus Measures the Universe

    When working as canon of a church, Copernicus uses the tower to make measurements on the stars. To make measurements, he would measure the angles, altitudes, and distances of stars and planets. This further deviated his theory of the universe from the geocentric theory.
  • 1514

    Copernicus Shares his Heliocentric Theory

    By 1514, Copernicus had written a short report (called the Little Commentary) on his heliocentric theory of the universe, sharing this viewpoint with some of his scientific peers.
  • 1532

    Copernicus Completes his Scientific Findings

    After 16 arduous years of measurements, Copernicus completes his detailed astronomical manuscript on his heliocentric theory. This further demonstrates his loyalty to the theory and deviance from the norms of the past.
  • 1541

    Copernicus Publishes His Heliocentric Theory

    After many years, Copernicus publishes his book "De Revolutionibus Orbium Celestium," which fully explained his measurements and reasons for believing in the heliocentric theory. With this, his thoughts could be shared with the world, influencing the geocentric theory to be further questioned and eventually disproved.
  • May 24, 1543

    Copernicus Dies

  • Feb 15, 1564

    Galileo is Born

    He is born in Pisa, Italy
  • Galileo Finds Interest in Astronomy

    Through the observance of tides, Galileo realizes that they do not line up with the geocentric theory, leading him to begin to support the heliocentric theory.
  • Galileo Reads About the Heliocentric Theory

    Galileo reads a book from Johannes Kepler explaining the heliocentric theory, introducing Galileo to the theory.
  • Galileo Sees a Supernova

    By seeing a supernova, Galileo knows that the universe changes, unlike what Aristotle believed.
  • Galileo Seeds Jupiters Moons

    By observing moons orbit around Jupiter, Galileo has evidence proving that not everything revolves around the Earth like the geocentric theory stated.
  • Galileo Writes The Starry Messenger

    This book explains the evidence Galileo gathered for the heliocentric theory.
  • Galileo's Book

    His book follows the comparison between heliocentric and geocentric view, but it was not recieved well by the public.
  • Galileo Dies

  • Issac Newton is Born

  • Newton Attends Elementary School

    While in elementary school, Newton spends his time making numerous scientific contraptions instead of socializing with other kids. This demonstrates his passion for science from an extremely young age.
  • Newton Attends Cambridge University

    In pursuit of a mathematics degree, Newton attends Cambridge University, where his deepened understanding of math allows him to link science and math together.
  • Newton Makes Initial Discoveries

    Newton discovers and proves that white light is composed of all colors. He also begins to discover the law of universal gravitation.
  • Newton Publishes his Revolutionary Book, Gathers Further Evidence for Heliocentric Theory

    Newton publishes the "Mathematical Principles of Natural Philosphy," which covered the three laws of motion, expanded on Kepler's Laws of Motion, and stated the Law of Universal Gravitation. During this time, Newton observed planetary motion through a telescope of his own design, furthering his testimonies for the heliocentric theory.
  • Newton Dies

  • Charles Darwin is Born

  • Charles Darwin Leaves on the SS Beagle

    On this voyage, Darwin studies fossils, finches, and ocean levels in order to gather evidence that he then used in his theory of evolution.
  • Mendeleev is Born

  • Darwin Returns Home from the Beagle

    After his voyage, Darwin returns home and analyzes his data in order to come up with his theory of natural selection and the theory of evolution.
  • Darwin Publishes His Book

    Charles Darwin publishes his book "On the Origin of Species," sharing his theories with the world. Unfortunately, his ideas were met with a lot of disdain since they challenged religious ideals.
  • Mendeleev Attends one of the First International Chemistry Conferences

  • Mendeleev Publishes Organic Chemistry book

  • Marie Curie is Born

    Marie Curie is born in Warsaw, Poland
  • Mendeleev Devises the First Periodic Table

  • Alfred Wegner Born

  • Darwin Dies

  • Curie Graduates Highschool

    At age 15, Curie graduates highschool with a love of science since her father had surrounded her with scientific instruments from a young age.
  • Curie Graduates from Sorbonne

    Curie is the first ever woman to graduate with a degree in physics at Sorbonne.
  • Marie Marries Pierre Curie

    Marie marries Pierre Curie, who was also a scientist, furthering her lifelong passion for science.
  • Curie Discovers Radium

    After years of research and speculations, Curie discovers the element radium, and along with it the concept of radioactivity.
  • Curie Clearly Sees Radium

    After working strenuously to separate radium from other substances, Marie succeeds and is able to see radioactivity clearly for the first time, allowing her to develop a theory on radioactivity. This theory allowed scientists to further understand the structure of an atom, in turn allowing them to understand the structure of matter, in turn allowing them to evaluate the structure of the universe. Essentially, Curie's beliefs shaped many of the theories of the universe today.
  • Curie Gets Doctors Degree

    Curie gets a doctors degree in physics and receives a Nobel Prize for her discovery of radioactivity.
  • Wegner Recieves a PhD in Astronomy

  • Harry Hess Born

  • Curie Teaches at Sorbonne

    Curie becomes the first ever female professor in Sorbonne's history.
  • Mendeleev Dies

  • Wegner Notices South America Border Fits with Africa

  • Wegner Publishes His Book About Pangea

    By noticing country borders fit together, fossils from differernt areas matched, and came up with preliminary plate tectonics.
  • Francis Crick Born

  • Rosalind Franklin is Born

  • James Watson Born

  • Wegner Dies

  • Curie Dies

  • Hess Discovers Ocean Floor is Covered in Volcanoes

  • Hess Discovers Ocean Floor is Covered in Volcanoes

    By discovering the volcanic nature of the ocean floor, it provided evidence that the tectonic plates were in motion.
  • Rosalind Begins Studying DNA at King's College

  • Watson Works on His PhD

    Watson works to get his degree in protein crystallography.
  • Franklin Takes X-Ray Images

    Here, Franklin takes X-ray crystallography images of DNA, allowing for the structure of DNA to finally be understood.
  • Watson and Crick Release their DNA Model

  • Rosalind Franklin Dies

  • Hess Publishes Theory of Ocean Spreading

  • Watson and Crick Win the Nobel Prize

  • Hess Dies

  • Francis Crick Dies

  • Period:
    -276 BCE
    to
    -194 BCE

    Eratosthenes Lifetime

    In his lifetime, he used trigonometry to accurately measure the circumference of the Earth. He also calculated the tilt of the Earth's axis.