It+All+Goes+Round

__**Introduction**__ Our understanding of the Earth and our place in the Universe has been pondered and theorized about since the beginning of man's existence. Technology developments and belief systems have often shaped our understandings and have led to changes in how we look at the Universe and our tiny part in it. In Science we often use models to demonstrate our understanding and to convince ourselves and others that what we think is correct. This unit will focus on some of those models and how our understanding of our little place in the Universe has changed.

__**Guiding Question**__: To what extent do we understand the world around us through the tangible (senses, experiences, and experiments) and through the intangible (models, systems, conceptual framworks)?

__**Geocentric vs. Heliocentric**__ - Who has shaped our current model of our solar system?

Find out what these great thinkers thought about our solar system and what their contributions to astronomy were: Aristotle, Ptolemy, Copernicus, Kepler and Galileo

Animations of geocentric and heliocentric models

media type="youtube" key="BOxtiUPdHiM" height="315" width="420"

media type="youtube" key="wGZdaOsuodQ" height="315" width="420"

media type="youtube" key="3d2TjwxmueQ" height="315" width="420"

media type="youtube" key="bODkzyPyd5k" height="315" width="420"

media type="youtube" key="gI8XYiELkvM" height="315" width="420"

Thanks to Nic in 8Y 2012 for this cool video on size and scale in our universe. media type="youtube" key="HEheh1BH34Q" height="315" width="560"