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Einstein's 1911 & 1915 papers below:
https://archive.org/details/EinsteinO...
https://etienneklein.fr/wp-content/up...

Why do we think space is curved near the sun? Because we see Mercury's orbit precess. We thought it was due to gravitational effects of other planets. But, that accounts for about 92% of it. The remaining 8% comes from the spatial curvature of the sun as predicted by Einstein in his general theory of relativity. Also, to account for the deflection of light by our sun, we need to account for both space and time curvature.

The visuals are inspired from the book - 'Relativity Visualised by Lewis Caroll Epstein'.
Check it out, the book is awesome.

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