1. Introduction to the Universe Astro 1105/1107 Prof. Julia Kregenow Welcome back!

2. Course Announcements Any problems accessing MasteringAstronomy hw? Reading Assignment for tomorrow: Ch 2 & 3 - see “Course Schedule” online for parts to SKIP! - take reading notes (how?) - real reading quiz tomorrow Homework for tomorrow (due 10:30am) Reading Questions Ch 1 & 2 (online) Sun observing (optional) Thursday 1pm (Fri backup)

3. Syllabus Quiz All books and papers off your desk. PRS only.

4. What is your professor’s name? 1. John 2. Fred 3. Mick Jagger 4. Julia 5. Hey You

5. Why are we doing reading quizzes and reading questions? 1. To ensure that you’re reading the text 2. To be mean 3. To take attendance 4. So Julia doesn’t have to lecture as much 5. No reason

6. The final exam is ______. 1. optional 2. required

7. What % of the course grade is in-class participation? A.0% B.15% C.45% D.75%

8. What should you do if you are running 5 minutes late for class one day and will miss the reading quiz? 1. Skip class 2. Freak out 3. Make up the reading quiz after class 4. Relax; you get 3 freebie days

9. Survey results Black holes: ||||||| Whole / end of / beginning of / beyond Universe: |||||| Alien life: ||| Dark matter / energy: ||| Star formation / life cycle: || Galaxies / formation: || Earth place in Universe: || Methods of discovery: | Space travel: | Stargazing / starmaps: |||| (come to evening viewing sessions!) Solar flares / storms: || (come to Sun viewing session!) Mars: || (see textbook on reserve in Physical Sciences Library) Time Travel: | (see pg 466 in textbook) Antimatter: | (check your textbook index - sprinkled throughout)

10. -The rising and setting of the sun -The rising and setting of the moon -The rising and setting of stars -The rising and setting of distant galaxies Answer: 0, 1, 2, 3, or 4? The rotation of the earth about its axis causes how many of the following?

11. Sec 2.1 Why do stars rise and set?

12. How long was the camera shutter left open to make this time-lapse photograph? (p27) 1. About 1 minute 2. About 30 minutes 3. About 6 hours 4. About 12 hours 5. About 24 hours

13. What direction is the observer facing in this picture? (p27)

15. Which of the following time-lapse pictures could have been taken in northern Alaska? 1. 2. 3. 4. All 5. None

16. Viewed from the earth’s equator, stars set 1. about six hours after they rise. 2. about twelve hours after they rise. 3. about twenty four hours after they rise. 4. never. 5. at different times, depending on the star.

17. Viewed from the earth’s pole*, stars set 1. about six hours after they rise. 2. about twelve hours after they rise. 3. about twenty four hours after they rise. 4. never. 5. at different times, depending on the star. * Either North or South

18. What direction is the camera facing in this picture?

19. Sec 2.2 What causes the changing seasons?

20. Temperatures are warmer in summer primarily because 1. Earth is closer to the Sun 2. One hemisphere of Earth is closer to the Sun 3. The Sun appears higher in the sky 4. Both 1 & 2

21. 1. Angle of sunlight. (More direct = warmer: summer) 2. Length of day. (Longer day = warmer: summer) Sun’s height in sky determines:

22. It’s all about the axis tilt

23. animated figure… It’s all about the axis tilt