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Table of contents

Astro 10-Lecture 14: Large Scale Structure and Cosmology

Extra Credit Assignment

Review: Structure in the Universe

Superclusters, Walls, and Voids.

But on the largest scales the universe begins to look smooth


Which brings us to cosmology.

Start with something even more basic...

Possible Reasons….

Slide 10

Searching for an answer

How old is the universe?

“The Observable Universe”

“Lookback time”

Assumptions in Cosmology

Slide 16

Basic Concepts of Cosmology

Basic Concepts: The Big-Bang Theory

More Basic Concepts of Cosmology

The geometry of the universe

Slide 21

Mass and Energy determine the curvature of the universe

Slide 23

Slide 24

How do we tell what the geometry of the universe is?

Determining the Geometry of Space-Time

Slide 27

Same is true for volume

How else can we measure the geometry of Space-Time?

Determining the Geometry of Space-Time

Contributions to the Mass and Energy of the Universe

What is Dark Matter?

Back to the Big Bang Theory

A Big-Bang Timeline

Slide 35

The Four Forces

Slide 37


Inflation flattens the universe

Predictions of Inflation Theory

Continuing the timeline

Big Bang Nucleosynthesis

Slide 43

Slide 44

Continuing the Big-Bang Timeline

The Cosmic Microwave Background

Slide 47

Slide 48

Cosmic Microwave Background

So back to the problem: Where is the missing mass/energy?

The Cosmological Constant

The Cosmological Constant aka Dark Energy

The properties of dark energy

Slide 54

Structure formation

Slide 56

Author: Eric Korpela

E-mail: korpela at


Further information:
For the educational use of the Vista Astro 10 class only