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Black Holes: Where Spacetime Breaks

Black Holes: Where Spacetime Breaks

Black Holes: Where Spacetime Breaks Series: Spacetime Physics | Part: 3 of 9 Primary Tag: FRONTIER SCIENCE Keywords: black holes, event horizon, singularity, Schwarzschild, Penrose, Hawking radiation Within months of Einstein publishing general relativity in 1915, Karl Schwarzschild—a German physicist serving on the Russian front in World War I—sent

General Relativity: Gravity Is Geometry

General Relativity: Gravity Is Geometry

General Relativity: Gravity Is Geometry Series: Spacetime Physics | Part: 2 of 9 Primary Tag: FRONTIER SCIENCE Keywords: general relativity, Einstein, curved spacetime, gravity, geodesics, gravitational lensing In 1907, Albert Einstein had what he later called "the happiest thought of my life." He imagined a person falling freely from

Special Relativity: Why Nothing Outruns Light

Special Relativity: Why Nothing Outruns Light

Special Relativity: Why Nothing Outruns Light Series: Spacetime Physics | Part: 1 of 9 Primary Tag: FRONTIER SCIENCE Keywords: special relativity, Einstein, time dilation, length contraction, speed of light, E=mc² In 1905, a 26-year-old patent clerk published a paper that demolished Newton's framework of absolute space and absolute

The Physics of Space and Time

The Physics of Space and Time

The Physics of Space and Time Primary Tag: FRONTIER SCIENCE Keywords: spacetime, relativity, Einstein, gravity, wormholes, time travel, quantum gravity We live in space and time. We move through space. We age through time. These seem like the most basic facts of existence—so obvious they barely need stating. But