411 REFERENCE · Wikibooks
General Astronomy/Motion and Gravity
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
General Astronomy Observational Astronomy Motion and Gravity Principles of Light inplace
chapter
The First Physics (Aristotle) chapter
Difficulties in the Geocentric Model chapter
The Heliocentric Model (Copernicus) chapter
New Ideas About Motion (Galileo) chapter
Order in Planetary Orbits chapter
General Astronomy Observational Astronomy Motion and Gravity Principles of Light inplace