The Cosmic Distance Scale

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Table of Contents

The Cosmic Distance Scale

Outline

Quick Review of Scientific Notation

Powers of Ten

And remember...

How Many Grains of Sand?

A Quick Tour from the Unimaginably Tiny to the Incomprehensibly Big

PPT Slide

Units for Time and Distance

PPT Slide

Radar Measurements

But...

The Nearest Stars

The Solar Neighborhood

Distances to Nearby Stars

Parallax

Historical Note

Parallax

So...

Cepheids

Cepheid Variables

Distances to Cepheids

If no Cepheids can be seen...

Life Cycles of Stars

Supernova… Going out with a Blast!

Crab Nebula

Crab Nebula

Crab Nebula

Crab Nebula and Pulsar

Distances to Supernovae

Distances to Supernovae

But to really “measure the Universe”...

Historical Note

What Hubble Found

Hubble’s Law

Implications of Hubble’s Law

Doppler Shift

What It Looks Like

Doppler Shift / Redshift

Hubble’s Law Revisited

Example

And so the Universe is...

Books and Slides

Videos

Web

More Web

More Web

Wrap Up…at long last!

Author: Laura Whitlock

Email: laura.whitlock@sonoma.edu

Home Page: http://perry.sonoma.edu/~whitlock