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Einstein realizes his thoughts on gravity might explain Mercury's orbit in ways that Newton's law could not.
Was Newton wrong? Einstein says maybe it's my theory of gravity. Is this simple enough to explain all these experimental data? He calculated painfully the orbit of Mercury and there was a near perfect match. His equations on a notepad match the motion of heavenly bodies in outer space. He has heart palpitations and he suddenly realizes, oh my god, the theory is correct.
He was so filled with joy that he couldn't make his brain focus. And for Einstein, that's a big deal.
He finally gets the equations right just as David Hilbert does. There is a little bit of dispute who got the equations first.
There's a lot of rancor at that moment. Einstein gets so hurt.
Hilbert was very gracious. He says it's Einstein's theory, Einstein deserves the credit.
He is victorious.
The theory is Einstein's.
On November 25th 1915, a momentarily triumphant Albert Einstein holds in his hands what he believes is the final equation for the General Theory of Relativity, his theory of gravity, just in time for his presentation at the Prussian Academy.
He goes to the Academy and he speaks, not for very long, it's a short paper. With that, you have General Theory of Relativity which describes how space and time tell matter and engergy where to go, matter and energy tell space and time how to look. Utterly different view of what our universe is like.
Who knows how much applause he got, nobody does.
Everyone suddenly found themselves confronted with the idea that the strange German Jew had overthrown Newton's ideas of gravity. What exactly this meant now? No one was quite sure.
There's no physical proof of it.
No one understood Einstein.
Einstein believes he has finally got his theory right, but he knows that it won't be accepted until he can prove it. And he can't prove it withouth photographs of a total solar eclipse. For that, Einstein will have to wait again. 

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