Our Connection to the Universe
Exercises, Knowledge Concepts

Everything Moves
The Expanding Universe
Motion Through the Millennia
The Universe Goes ‘Round
Gravity’s Hold on the Cosmos
Gravity and Light
The Eternal Free Fall of Orbits
Gravity Rules
Exercises, Knowledge Concepts

The Stuff of the Universe
Matter’s Many Guises
The Scarcity of Matter
We Are Stardust
The Physics of Dense Matter
Too Much Matter
Exercises, Knowledge Concepts

The Power of Cosmic Phenomena
Energy Powers the Universe
By the Light of a Star
Probing Space with Spectra
Electromagnetism at Work
Sighting the Superenergetic
Evidence for Supermassive Black Holes Exercises, Knowledge Concepts

The Limits of Motion, Matter, and Energy
Does Matter + Energy = Life?
Where Did the Universe Come From?
How Small Does Matter Get?
The Source of Big Explosions
Where Does the Universe Go From Here?
What Lies Ahead
Exercises, Knowledge Concepts

Progress in Understanding the Cosmos:
   A Selected Chronology

About the Authors