Gravity Articles

Posts

sun_getting_smaller

Either the Sun Is Getting Smaller or Gravity Is Getting Weaker

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Paper discussion: Solar system expansion and strong equivalence…
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…
spacetimecon

Struggles with the Continuum: Spacetime Conclusion

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 We've been looking at how the continuum nature…
11dgravity

11d Gravity From Just the Torsion Constraint

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 It is familiar that Einstein gravity may be formulated …
spacetime7

Struggles with the Continuum: General Relativity

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 Combining electromagnetism with relativity and…
spacetime4

Struggles with the Continuum - Relativity and Quantum

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 In this series we're looking at mathematical problems…
earthgravity

All about Earth's Gravity

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Earth's gravitational field at the surface is approximately 9.8…
gravity3

Does Gravity Gravitate: The Wave

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 In the first two posts in this series, we looked…
gravitate2

Does Gravity Gravitate? Part 2

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 In the first post of this series, I talked about…
gravitate

Does Gravity Gravitate?

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 The title question of this article is one that…
balloonanalogy

Inflation Balloon Analogy Misconceptions

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This article was written with considerable input from several…
gravityacceleration

Why Is Acceleration Due to Gravity a Constant?

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This question has popped up many times. So here is an attempt…
planck

A Hand-Wavy Discussion of the Planck Length

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The Planck length is an extremely small distance constructed…
spacetime2

Struggles With The Continuum: Quantum Mechanics of Charged Particles

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 Last time we saw that that nobody yet knows if…
gravitywaves

How Fast Do Changes in the Gravitational Field Propagate?

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General relativity predicts that disturbances in the gravitational…
gravity

Understanding the General Relativity View of Gravity on Earth

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Often students have difficulty reconciling the General Relativity…