ASTRONOMY DAY10 SEPTEMBER 30 Learning Target: I can explain how ancient astronomers impacted todays thinking about the universe. VOCABULARY Retrograde motion epicycles AGENDA 1.Reminder Test Corrections 2.Stellarium due today 3.Constellation Project due today 4.How to use your sky wheelcharts-and-star-wheels/ Notes on Astronomers QUIZ 1.Describe the difference between heliocentric and geocentric 2.Name one person who supported geocentric thinking 3.Name one person who supported heliocentric thinking