This Book is a Planetarium

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Never has humble paper had such radical ambitions.

Defying every expectation of what a book can be, this pop-up extravaganza transforms into six fully functional tools: a real working planetarium projecting the constellations, a musical instrument complete with strings for strumming, a geometric drawing generator, an infinite calendar, a message decoder, and even a speaker that amplifies sound. Artist Kelli Anderson contributes enlightening text alongside each pop-up, explaining the scientific principles at play in her constructions and creating an interactive experience that's as educational as it is extraordinary. Inspiring awe that lasts long after the initial pop, This Book Is a Planetarium leaves readers of all ages with a renewed appreciation for the way things work—and for the enduring magic of books.

ncludes six functional pop-up paper contraptions:

Pages: 5 pp;
Format: Hardcover 

Includes six functional pop-up paper contraptions:

planetarium-instrument.jpg A musical instrument 
Sound is produced when something physical vibrates the air surrounding it—whether that object is a string, vocal chords, or a speaker.

A decoder ring 
Substitution is when each letter is swapped for a different character falling a specified number of positions away.

planetarium-calendar.jpg A perpetual calendar 
This perpetual calendar works because it is a wheel—which, like a year, is also a cycle divisible into smaller units.
planetarium.jpg A planetarium 
Light rays travel through transparent materials, bounce off of reflective surfaces, and are stopped by unreflective objects. Here, most of the light is blocked by the paper walls, which reflect the light back into the glowing dome.
planetarium-speaker.jpg A speaker 
The speaker works because its conical structure takes advantage of how sound waves travel through air.
planetarium-spiralgraph.jpg A spiralgraph 
The spiralgraph produces beautiful patterns through the action of nested spinning.