General Relativity in Action: Eclipses & The Mystery of "Shifting" Stars

For something so imperative to our existence (and the existence of the universe in general), the concept of gravity is not well understood. This is unfortunate. Since it is intrinsically tied to space, time, matter, and mass, it is intrinsically tied to our understanding of the cosmos. Without it, matter would not be compelled to accumulate, therefore there would be no attraction for our sun and the Earth to form.(obviously, No sun and no Earth = no us). So we know that gravity is important, but what is it?

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