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139,000 BCE
Big Bang
13.9 billion years ago all matter expanded out from a single point creating our universe. -
Period: 139,000 BCE to 137,000 BCE
Large Scale
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137,000 BCE
Stars Light Up
13.7 billion years ago or 200 million years after the big bang the first stars appeared from the differences in matter and gravity tying everything together. -
12,000 BCE
Hominids Appear
The first hominids appeared around 7 million years ago. They were the earliest apes that evolved into us human beings. -
Period: 12,000 BCE to
Small Scale
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276 BCE
Eratosthenes
Greek guy found circumference of the Earth. -
100
Ptolemy
Ptolemy was born on 100 AD in ancient greece. He was a greek astronomer that created the early models of the universe. -
1473
Copernicus
Challenged the idea of a geocentric view of the universe. -
1546
Brahe
Made accurate observations of the stars -
1561
Bacon
Developed scientific method. -
1564
Galileo
Proved Copernicus's idea using his modified telescope. -
1571
Kepler
Known for the laws of planetary motion. -
Descartes
He was skeptical. -
Locke
Liberal. Believed people shape who they are and aren't born who they are. -
Newton
Discovered gravity, -
Mendeleev
Organized all the elements, known and unknown in a table we call the periodic table. -
Curie
Studied and created some radioactive elements which lead to the creation of medical devices like x-rays. -
Leavitt
Found out about the light in the universe and measured the size of our universe. -
Wegener
Found the countries fit like a puzzle and moved!!! -
Hubble
Hubble proved the universe is expanding. -
Hess
Plate tectonics. He created it in WW2.