Mapping the universe


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Table of Contents

Mapping the universe

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The Great Debate

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Cosmic distances

Galaxies everywhere

The Hubble Space Telescope

The Hubble Deep Field

The expanding universe

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Measuring redshifts

Hubble’s Law

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The expanding universe means that we can make a 3D map of the galaxies by measuring redshifts: The ‘Redshift Survey’

The distribution of the galaxies

Redshift surveys (mid-1980s)

The 2dF Galaxy Redshift Survey

Going faster with fibre optics

Tha AAT and The 2-degree Field

2dF top end

2dF on the AAT

Tiling strategy

2dFGRS geometry

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The state of the art in galaxy clustering

Fine detail: 2-degree thick slices (1-degree steps)

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Why do galaxies, clusters, and superclusters exist?

The expanding curved universe

History of the expansion

The uncertainty principle (1927)

Quantum fluctuations and cosmic structure

Gravitational instability: hierarchical collapse generates ever larger structures

The Hot Big Bang

COBE Microwave Sky

COBE microwave sky: 25,000 X stretch

Observing prehistoric structure

Weighing the universe

Weighing the universe

Simulating structure formation

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Forming superclusters (comoving view)

Non-gravitational caustics

The Hubble Volume Simulation

Our place in the universe

The outlook for cosmology

Author: John Peacock