"Earth Rotating" google images
"Earth's Rotation Equals" Wikipeadia
"Sun, Earth, Moon animation" You tube
"Earth and Moon Revolving" google images
"Orbit of the Moon" Wikipeadia
"Earth completes its" quora.com
"How Do Satellite's Orbit, Brain Stuff" You Tube
"Gravity and Orbit" phet.colorado.edu
"How Science Defines Year" You Tube
"Daylight Savings Time" You Tube
"Happy New Year! Again!" Discovery Magazine
"Spinning Things, Bill Nye" You Tube
"Why We Have Time Zones" You Tube
"Why do we have different time zones?" You Tube
"How did trains standardize time zone" Ted-Ed You Tube