General Relativity Articles

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Kerr Spacetime

Fermi-Walker Transport in Kerr Spacetime

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In the last two posts in this series, we developed some tools…
Minkowski_Spacetime_2

Fermi-Walker Transport in Schwarzschild Spacetime

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In the first post in this series, we introduced the concepts…
Minkowski Spacetime

How to Study Fermi-Walker Transport in Minkowski Spacetime

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This is the first of several posts that will develop some mathematical…
information definition

How to Better Define Information in Physics

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When I ask questions about conservation of information I frequently…
maxima

Solving Einstein's Field Equations in Maxima

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A few months ago, pervect pointed me to a post by Chris Hillman…
SchwarzschildGeometry4

The Schwarzschild Geometry: Physically Reasonable?

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 In the last article, we looked at various counterintuitive…
SchwarzschildGeometry3

The Schwarzschild Geometry: Spacetime Diagrams

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 When we left off in part 2, we were looking at…
SchwarzschildGeometry2

The Schwarzschild Geometry: Coordinates

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 At the end of part 1, we looked at the form the…
SchwarzschildGeometry1

The Schwarzschild Geometry: Key Properties

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 Not long after Einstein published his Field Equation,…
relativitygauge

General Relativity as a Gauge Theory

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The fundamental interactions of the Standard Model are described…
Precessionrelaitivity

Precession in Special and General Relativity

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The Absolute DerivativeIn relativity we typically deal with…
Newton-Cartan-Theory

The Revival of Newton-Cartan Theory

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It's a calculation which you can find in any textbook on General…
universeexpand

A Brief on the Expansion of the Universe

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The "ordinary Big Bang and expansion" (no inflation, no dark…
observableuniverse

Radius of the Observable Universe in Light-years Is Greater than Its Age

The radius of the observable universe is about 46 billion light…
universespinning

Can We Tell Whether the Universe Is Rotating?

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If you believe wholeheartedly in Mach's principle, then there…