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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
The Beginning of the Universe

Topic

The Beginning of the Universe

strong

Purpose

This topic aggregates entries about evidence for a beginning to the universe and its implications.

Entries

Expansion of Space

empirical · strong

The Borde–Guth–Vilenkin Theorem

mathematical · extremely-strong

Related

Fine-Tuning of Physical Constants Entropy & the Low-Entropy Initial State