Chapter 6
Putting the You in Universe
We exist somewhere in the middle of an awesome reality that expands many powers of ten above us and submerges many powers of ten below us. Build upon everything we learned in previous chapters to understand how this universe began, how stars work, and where all the matter on our planet came from. Learn what E equals MC squared means, and discover the Awesome Energymatter Idea.
Activities
 How Long Is a Light Year?
Dr. Art made a math mistake! You calculate how long a light year is, and then play with other units of distance that combine rate and time.  Who Is Afraid of Dina the Monster Bee?
Systems generally have properties that are QUALITATIVELY different than their parts. Even if you use the same kinds of parts to make the same kind of system, changing the scale (size) can make dramatic changes. That is one reason we care about the scale of systems, and the amazing range of sizes in our universe.
Multimedia
Links
 Powers of Ten on the Web
This interactive website allows you to explore reality on scales ranging from galaxies to planet Earth to subatomic particles.  Windows to the Universe
Windows to the Universe includes images, movies, animations, and data sets, that explore the Earth and Space sciences and the historical and cultural ties between science, exploration, and the human experience.
Just Kidding
Aunt Mathematica?s Name, page 89
Aunt Mathematica is a real person. Her father, Al Gebra, proposed to her mother, G.O Metry. G.O. accepted his marriage proposal, but only on the condition that they both change their last name to Mathematica. She did not want to have the name G.O. Gebra. Rumor has it that Aunt Mathematica?s first name is Aunt.
Off by a Factor of 1,000, page 88
One reason I put in the Just Kidding feature is so I could use it if I made a mistake in the book. Check out the math on page 88. In copies from the first printing of the book, I left out three zeros. The distance of a light year is 9,500,000,000,000 kilometers. For quick calculations, it is often expressed as 10 to the thirteenth km.



