1. Astronomy and Cosmology week 1 - Thursday Star Date Your surveys – results and discussionsurveys Your Web-X postsWeb-X Your minilecture sign-ups… BREAKminilecture Introduction to space and time Workshop: Planispheres + Starry NightPlanispheresStarry Night Workshop: Space and Time (go outside if clear)Space and Time Tomorrow and next weekTomorrow

2. Introduction to Space and Time Naked eye astronomy Constellations Time: Sky changes (Starry Night) Through the day, due to Earth’s rotation Through the year, due to Earth’s orbit Through the seasons, due to Earth’s tilt Through the epochs, due to precession Space celestial sphere Equinoxes, solstices

3. Naked eye astronomy What you see depends on where you are, in space, time and culture.

4. Constellations help orient us

5. Time: Sky changes (Starry Night) Through the day, due to Earth’s rotation Through the year, due to Earth’s orbit Through the seasons, due to Earth’s tilt Through the epochs, due to precession

6. Sky changes through the day, due to Earth’s rotation

7. Sky changes through the year, due to Earth’s orbit

8. Sky changes through the seasons, due to Earth’s tilt

9. Sky changes through the epochs, due to precession

10. Celestial sphere Altitude from horizonDeclination from equator (latitude) Azimuth from NorthRA from VE (longitude)

11. Equinoxes and solstices