Posts

bb_infinity2

Intro to Big Bang and Infinity Concepts

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This article is part of our student writer series. The writer…
journeycosmos3

A Journey Into the Cosmos - FLRW Metric and The Friedmann Equation

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This article is part of our student writer series. The writer…
expandinguniverse

Coordinate Dependent Statements in an Expanding Universe

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In this Insight we will discuss the general Robertson--Walker…
cosmosintro

A Journey Into the Cosmos - The Friedmann Equation

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  This article is part of our student writer series.…
inflation5

A Poor Man's CMB Primer: Quantum Seeds

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  The CMB establishes a record of ancient acoustic…
universestart

Where Did the Big Bang Happen?

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According to standard cosmological models, which are based on…
universeexpand

A Brief on the Expansion of the Universe

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The "ordinary Big Bang and expansion" (no inflation, no dark…
lightcone7_3

LightCone7 Tutorial Part III - How Things are Computed

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In Part I and Part II of this mini-series, we have briefly discussed…
lightcone72

LightCone7Combo Tutorial Part II - Charts

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Part I dealt with the basic user interface of LightCone7Combo.…
earlyuniverse

Was the Early Universe in a Disordered State?

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No. The second law of thermodynamics says that entropy can only…
observableuniverse

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

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

What Is the Steady-state Model and Why It's No Longer Viable

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[Back in 2011, I wrote a FAQ entry for physicsforums on the steady…
blackholesuniverse

Is the Universe a Black Hole?

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In the early universe, matter was gathered together at very high…
universespinning

Can We Tell Whether the Universe Is Rotating?

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

A Poor Man's CMB Primer: The Birth of a Cosmic Background Radiation

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  The early universe was hot. So hot, in fact, that…
cmb

A Poor Man's CMB Primer: Orientation of the Universe

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  This is a picture of the cosmic microwave background: Fig…
CosmologicalHorizons

Inflationary Misconceptions and the Basics of Cosmological Horizons

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It is a common saying that during inflation "space expanded faster…