Cosmos Story Vol 1
App Developer: Cosmos Story
Version 1.1
License: US$2.99 Compatible with iPhone, iPod touch, and iPad. Requires IOS 5.0 or later.

As an amateur astronomer and a volunteer with Project ASTRO, I regularly use the concept of scale to help teach astronomy and engage our students in visualizing and grasping the immensity of our universe. I typically use examples scaled in the dimension of physical length, area, and volume to assist in illustrating the distance and sizes of planets, our solar system and neighboring stars and galaxies. The Cosmos Story application approaches this concept of the size of our universe in slightly different way by using the dimension of time as related to the speed of light. That is, light travels 186,000 miles per second or 300,000 kilometers per second. Working in this dimension, the distance between the Earth and our Moon is a little more than a second and the distance from the Earth to our Sun is a little more than eight minutes.

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