The year 2015 marked the 100th anniversary of the most profound of Einstein's intellectual feats, general relativity, a theory that explains the relationship between gravity and matter.
With this work, Einstein unleashed extraordinary new concepts such as black holes, the Big Bang, the bending of light by galaxies, and the rippling of gravitational waves through space, all consequences of the theory and the mathematical equations that describe it.
His ideas, set forth in a series of lectures in late 1915, were almost immediately applied to describe, for example, the unconventional orbit of the planet Mercury.
This article was originally published in the University's annual research magazine "Discovery: Research at Princeton."
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