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Cosmology

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Statement of the Borde–Guth–Vilenkin Theorem

Blackbody Spectrum Precision of the CMB CMB Anisotropies and the Seeds of Cosmic Structure Discovery of the Cosmic Microwave Background Isotropy of the Cosmic Microwave Background Why the CMB Refutes Steady-State Cosmology

Entropy as the Arrow of Time Low-Entropy Initial State of the Universe The Low-Entropy Big Bang The Penrose Entropy Calculation The Second Law of Thermodynamics Why a Low-Entropy Beginning Requires Explanation

Fine-Tuning of the Cosmological Constant

Entries coming soon.

Entries coming soon.

Entries coming soon.

Entries coming soon.

Expansion of Space The Borde–Guth–Vilenkin Theorem

Why the Quantum Vacuum Is Not Nothing

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Cosmology

Domain

Cosmology

Evidence from the origin, structure, and laws of the universe.

Purpose

This domain collects lines of evidence that arise from the large-scale properties of the universe.

Borde–Guth–Vilenkin (BGV) Theorem

Cosmic Microwave Background (CMB)

Entropy & the Low-Entropy Initial State

Fine-Tuning of Physical Constants

Inflation & Its Limits

Multiverse as Explanatory Attempt

Past-Eternal Models (and Their Failure)

Privileged Epoch & Observer Timing

The Beginning of the Universe

Why There Is Something Rather Than Nothing

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