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Investigating the Universe
Exploration One: The Vast Universe
First Thoughts: Looking at a Tiny Piece of the Sky
Activity 2: Sorting Through Galaxies

Exploration Two: Measuring Distances in the Universe
Activity 3: Measuring Parallax of Stars in Images
Parallax
Exploration Three: Measuring Distances with Standard Candles
First Thoughts: Estimating Distance by Comparing Brightness

Activity 3: Measuring Distance Using Cepheids
Cepheid
Activity 4: Measuring Cosmological Distances Using Type la Supernova
Type la Supernova
Exploration Four: Measuring the Age of the Universe
Activity 3: Measuring Redshift of Spectra from Galaxies
Redshift
Challenge: Measuring the Size and Age of the Universe
Investigating the Universe Challenge Area of the Data Center
Unit Review: Doing Science
Universe Through Time - Coming Soon
Supernovae, Gamma Ray Bursts, and the History of the Universe - Coming Soon
Back Through Time and Space to the Cosmic Background - Coming Soon
Spectra of Galaxies - Coming Soon
Objects at the Edge of the Universe - Coming Soon
Unit Review: Extending Your Work
Recommended Resources
Lonely Hearts of the Cosmos: The Story of the Scientific Quest for the Secret of the Universe by Dennis Overbye (Back Bay Book, ISBN-10: 0316648965, ISBN-13: 978-0316648967)—a book about the people who have contributed to our understanding about the nature of the universe
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