Black Holes - Prediction, Properties, and Structure
http://edu-observatory.org/olli/BH/Week1.html



Five Papers That Shook the World
  https://physicsworld.com/a/five-papers-that-shook-the-world/

ON THE ELECTRODYNAMICS OF MOVING BODIES  By A. Einstein
  http://www.fourmilab.ch/etexts/einstein/specrel/specrel.pdf

Documentary: Life of Albert Einstein   (90 min)
  https://www.youtube.com/watch?v=R_yk45m4E3M
  https://www.youtube.com/watch?v=ASzECGtSpqQ
  
GR: 100 years of the most beautiful theory ever created
  https://arstechnica.com/science/2015/12/general-relativity-100-years-of-the-most-beautiful-theory-ever-created/

  To truly dig into general relativity, as in all branches of
  theoretical physics, it takes math. Hardcore math. The crux
  of the matter is the mirroring of the structure of reality
  in mathematical structures. And in this light, talking about
  a physical theory without its equations is rather like
  talking about music-worthwhile in some ways, but everyone
  can acknowledge that something is missing.
  
  On the scale of elementary particles, the force of gravity
  is negligible, but on the scale of the cosmos, it dominates
  the structure of the observable universe.


Wikipedia - Karl Schwarzschild
  https://en.wikipedia.org/wiki/Karl_Schwarzschild
  https://en.wikipedia.org/wiki/Karl_Schwarzschild#Relativity

  Karl Schwarzschild provided the first exact solution to the
  Einstein field equations of general relativity, for the
  limited case of a single spherical non-rotating mass, which
  he accomplished in 1915, the same year that Einstein first
  introduced general relativity. The Schwarzschild solution,
  which makes use of Schwarzschild coordinates and the
  Schwarzschild metric, leads to a derivation of the
  Schwarzschild radius, which is the size of the event horizon
  of a non-rotating black hole.



  Schwarzschild accomplished this while serving in the German
  army during World War I. He died the following year from the
  autoimmune disease pemphigus, which he developed while at
  the Russian front. 

       

Black Hole Calculator
  https://www.vttoth.com/CMS/physics-notes/311-hawking-radiation-calculator

Wikipedia - Black Holes - History
  https://en.wikipedia.org/wiki/Black_hole#History
Wikipedia - Black Holes - Properties and structure
  https://en.wikipedia.org/wiki/Black_hole#Properties_and_structure

Black Holes 101 | National Geographic   (3 min)
  https://www.youtube.com/watch?v=kOEDG3j1bjs

What is a Black Hole? -- Black Holes Explained   (11 min)
  https://www.youtube.com/watch?v=EuC-yVzHhMI
  
What are Black Holes? - Sixty Symbols   (8+ min)
  https://www.youtube.com/watch?v=gcsaK3QYsdo

What Happens at the Event Horizon? | PBS Space Time   (20 min)
  https://www.youtube.com/watch?v=mht-1c4wc0Q
  


 
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