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Exploring the Universe: Astronomy 101

Join Dr. Michael Ottinger in discovering the wonders of the cosmos. Dive into planets, stars, and celestial phenomena. Regular labs and quizzes enhance learning. Interactive class sessions cover key topics. Be part of an intriguing astronomical journey now!

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Exploring the Universe: Astronomy 101

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  1. PHY 104 - Astronomy Lecture – Agenstein 109 Tuesday & Thursday 12:30 – 1:50 PM Lab – Agenstein 120 Tuesday 2:00 PM Thursday 2:00 PM Friday 2:00 PM Due to the limited number of Computers in the Lab, you must attend at your scheduled lab.

  2. Dr. Michael B. Ottinger • Office: Agenstein 101-J • Phone: 271-4592 • Web: staff.missouriwestern.edu/~ottinger • Office Hours: Monday 9:00 – 9:50 AM Tuesday 8:30 – 9:20 AM Thursday 8:30 – 9:20 AM Friday 9:00 – 9:50 & 11:00 – 11:50 AM and by appointment

  3. Text: Universe 8eby Roger Freedman

  4. Course Description • Introducing Astronomy Exam: February 7 • Planets and Moons Exam: March 20 • Stars and Stellar Evolution Final Exam: May 1 (11:30 – 1:20) All exams are closed book / closed note.

  5. Attendance Policy • You are expected to be in class every day, or be responsible for the information given. • Arriving late counts as ½ absence • Leaving early counts as ½ absence • After 5 unexcused absences (including lab) you will be dropped from the course • Excused absences for approved school related business – with prior notification

  6. Daily Reading Quizzes • We will cover one chapter of the text each class period. • At 12:30 I will hand out a short reading quiz to verify you have read the chapter. • Quiz taken from “Review Questions” at the end of the chapter • Quizzes will be collected at 12:35 pm. • Missing the quiz counts as a tardy (1/2 absence)

  7. End of Class Summaries • At the end of class I hand out a summary sheet. • In a few sentences summarize the main topics of the lecture. • Include any concepts/questions you would like me to cover at the beginning of the next class. • Not submitting a summary counts as leaving class early (1/2 absence)

  8. Lab • Labs meet weekly in Agenstein 120 • next week no class/lab on Tuesday, other labs will meet • Week before spring break Thursday/Friday labs will not meet • Lab reports to be completed individually during the lab period. • Each report worth 10 points.

  9. Grades A = 90 - 100% B= 80 - 90% C= 70 - 80% D= 60 - 70% F = <60% Quizzes: 20% Labs: 30% Exams: 50%

  10. Let’s Get Started • Reading Assignment: Before Thursday Jan 17: Read Chapter 1 Before Thursday Jan 24: Read Chapter 2 & 3

  11. When you look at the sky, what do you see? • Clouds • Moon • Sun • Stars • Comets • Shooting Stars • Planets (moving stars)

  12. How can we understand the Heavens? • Observations: What do you see? How do objects move? What Similarities or Differences exist? • Theory: Make a guess as to what you are observing that can predict future observations • Improved observations: Check theory • Observation: Sun rises in east and sets in the west every day and then rises in the east again. • Theory: Sun is a glowing ball of fire that rides on the back of the chariot of a God- taking off every morning and landing every night. • Sun sets later at points to the west. No matter how far west you travel, sun always sets further west. • “Scientific Method”

  13. Measurements • Angular Measurement: • Objects appear to move in circular paths around the earth • Stars orbit the North Star • 360 per revolution

  14. Angular vs Linear Size • Which is larger the Sun or the Moon? • Same Angular Size (as seen from Earth) • Sun has a diameter 400 times larger than the moon.

  15. Comparison Angular to Linear Size

  16. Calculating Angular Size Moon: Diameter = 3480 km Distance = 385,000 km Sun: Diameter = 1,400,000 km Distance = 150,000,000 km

  17. Scientific Notation • Distance to Sun: 150,000,000 km • Distance to Center of Galaxy: 100,000,000,000,000,000 km • Power of 10 Notation Sun: 1.5x108 km Center of Galaxy: 1.0x1017 km

  18. Powers of Ten Video

  19. Summary • Summarize the main topics of today’s class • Include any questions you would like answered at the beginning of class tomorrow. What did you not understand?

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