To access the course web page:

Step #1- go to:

D2L.arizona.edu

Step #2 – click on the “UA NetID Login” button located in the upper right corner of the page

Step #3 – Select our course

Ed’s Office Hrs: Tuesday 3:00 – 4:00 pm and

Thursday from 9:30 – 10:30 am

Erik’s Office Hrs: Monday 10:30 – 11:30 am

Wednesday 3:30 - 4:30 pm

Brandon’s Office Hrs: Wednesday 1:30 – 2:30 pm

and Thurs. 2:30 – 3:30 pm

GO TO ROOM 208 on the main floor of Steward Observatory!! For all office hrs

until further notice!

Course Announcements• Homework: “Introduction” and “Assignment #1” is

available on-line at the Mastering Astronomy (MA) website (“masteringastronomy.com”).

• Section 09 – Class ID “SP2007SEC09”• Section 11 – Class ID “SP2007SEC11”

• Go to the course webpage at D2L.arizona.edu to download the “getting started” powerpoint that illistrates how to sign-up and navigate MA.

• ASSIGNMENT #1 IS DUE JANUARY 25th IN CLASS - it will be graded pass/fail

MA Feedback• “I feel like it was trying to trick me. It was a

little confusing”• “it was very helpful in learning how to use

MA”• “I thought their was no math involved in this

course?”

MA Feedback

• “It taught me to think outside the box- no pun intended- for Part A. Using the hints were very helpful for Part B, it would have been almost impossible to figure the magic number out without them. Part C required simple math, and I made it harder than I had to, but I got it on the second try. I'd say it really helped me navigate using masteringastronomy.com, but I'm not sure how the questions were related.”

MA Feedback• “The Feedback given is contradictory.  For the

first three order questions I had arranged them in a certain order and it said that two were switched, so I switched them, submitted it again and the feedback told me the exact opposite, in other words the way I had just had it.  I don't think the order items is efficient at all.. I was very frustrated and almost gave up, because you have to submit the question 7 times with contradicting feedback each time.”

Question #1 - Is there Homework in this Class?

1. Yes2. No

Question #2 - Do you need to go to the Observatory at least once

this Semester?1. Yes2. No

Question #3 - Are there make up Exams?

1. Yes2. No

Question #4 - Do you get to drop an Exam?

1. Yes 2. No

Question #5 - Can You Drop or Reschedule the Final Exam?

1. Yes2. HELL NO

Question #6 - Is there Extra Credit?

1. Yes2. HELL NO

Question #7 - How long do you have to dispute a grade?

1. All Semester2. 24hrs after grades are

posted3. 48hrs after grades are

posted4. 72hrs after grades are

posted5. NEVER

Question #8 - Are you expected to stay in class for the full class

meeting?1. HELL YES2. No

Question #9 - Are you expected to participate in class discussions,

and Lecture Tutorials?1. HELL YES2. No

Question #10 - Are You an Exception to these Course

Policies?1. Yes2. HELL NO

What do you think?

• Do the stars stay in the same position in the sky all day/night long?

• Do we see the same stars all year round every night?

What do you think?

• What causes the stars move?

• Do the stars actually move in the way they appear from Earth?

• Is the daily motion of the Sun different from the stars?

Astrology: The belief that the positions of the stars and planets

as seen from Earth impact human events.

Constellations – the 88 semi-rectangular regions that make up the sky

• Northern constellations have Latinized Greek-mythology names:– Orion, Cygnus, Leo, Ursa Major, Canis Major, Canis

Minor

• Southern constellations have Latin names:– Telescopium, Sextans, Pyxsis

Use the Summer Triangle to find constellations during summer evenings

Use the winter triangle to find constellations during winter

evenings

Anyone recognize any shapes here?

Star Names

SIRIUS

Betelgeuse

Aldebaran

Rigel

Using Orion in to find other objects

Sirius

Aldebaran

Pleiades

Great Orion Nebula

Pleiades

SevenSisters

Subaru

Use the Big

Dipper in the

northern sky as a way to

find other groups of

stars

How to find stuff in the sky – Star Chartshttp://skymaps.com/

http://www.fourmilab.ch/yoursky/cities.html

http://www.astro.wisc.edu/~dolan/constellations/constellationjavalist.html

Consider the dome of the sky over our heads….

mixing bowl

inverted mixing bowl ….

Consider the dome of the sky over our heads….

Tutorial: Star Charts – p.23

Imagining a spinning Celestial Sphere

surrounding Earth aids in

thinking about the position

and motion of the sky

Imagining a spinning Celestial Sphere surrounding Earth aids in thinking about the position and motion of the sky

Animation!

Celestial Sphere Rotation

Celestial Sphere Rotation

North Star

Star A

Star B

1

1

3

3

2

2

4

4

Earth’s Equator

Figure 1

Celestial Sphere

Celestial Sphere Rotation

Celestial Sphere Rotation

Celestial Sphere

Star A

Star B

1

1

3

2

2

4

4

3

Figure 2

Horizon

Celestial Sphere

Celestial Sphere Rotation

Celestial Sphere Rotation

Celestial Sphere

Star A

Star B

1

1

3

2

2

4

4

3

Figure 2

Horizon

Is the horizon shown a real physical horizon, or an imaginary plane that extends from the observer and Earth out to the stars?

Can the observer shown see an object located below the horizon?

Is there a star that is in an unobservable position?

When a star travels from being below the observer’s horizon to being above the observer’s horizon, is that star rising or setting?

Tutorial: Position – p.1• Work with a partner• Read the instructions and questions carefully• Talk to each other and discuss your answers with each

another• Come to a consensus answer you both agree on• If you get stuck or are not sure of your answer ask

another group• If you get really stuck or don’t understand what the

Lecture Tutorial is asking as one of us for help

Celestial Sphere Rotation

Celestial Sphere Rotation

North Star

Star A

Star B

1

1

3

3

2

2

4

4

Earth’s Equator

Figure 1

Celestial Sphere

Celestial Sphere Rotation

Celestial Sphere Rotation

Celestial Sphere

Star A

Star B

1

1

3

2

2

4

4

3

Figure 2

Horizon

North Star

Did you get the Key Ideas from the Position Lecture Tutorial?

In what direction is the

observer facing?

1. toward the South2. toward the North3. toward the East4. toward the West

Celestial Sphere

Celestial Sphere Rotation

Celestial Sphere Rotation

Celestial Sphere

Star A

Star B

1

1

3

2

2

4

4

3

Figure 2

Horizon

Imagine that from your current location you observe a star rising directly in the east.

When this star reaches its highest position above the horizon, where will it be?

A. high in the northern skyB. high in the southern skyC. high in the western skyD. directly overhead

Where would the observer

look to see the star indicated by

the arrow?

A. High in the NortheastB. High in the SoutheastC. High in the Northwest D. High in the Southwest

Celestial Sphere

Celestial Sphere Rotation

Celestial Sphere Rotation

Celestial Sphere

Star A

Star B

1

1

3

2

2

4

4

3

Figure 2

Horizon

How long did it take to get this

picture?

Take out a piece of paper and put your name and student ID # on it along

with your answer!!

Earth’s rotation

causes the Sun, Planets,

Moon and stars to appear to move when viewed from

Earth

Nightly Motion of the Stars

• Imagine looking toward the East as a star rises above your horizon - what does it do after that?

Nightly Motion of the Stars

Celestial Sphere

Celestial Sphere Rotation

Celestial Sphere Rotation

Celestial Sphere

Star A

Star B

1

1

3

2

2

4

4

3

Figure 2

Horizon

Nightly Motion of the Stars

• For stars (the Moon and planets) that appear in the southern sky: Stars first rise near the eastern horizon, move upward and toward the south, and then move down and set near the western horizon.

What direction is the camera facing in

this picture

What direction

is the observer facing in

this picture?

What direction is the observer facing in this

picture?

Nightly Motion of the Stars

• Imagine looking toward the North. What do stars appear to do over the course of an evening?

Nightly Motion of the Stars

Celestial Sphere

Celestial Sphere Rotation

Celestial Sphere Rotation

Celestial Sphere

Star A

Star B

1

1

3

2

2

4

4

3

Figure 2

Horizon

Nightly Motion of the Stars

• Looking North: Stars appear to move counter-clockwise around the stationary North Star (Polaris) – we call these circumpolar stars.

Looking North: Circumpolar Stars

– Circumpolar stars seem to move counter-clockwise around the stationary North Star.

– These constellations and stars are visible any night of the year in the NORTHERN sky because they never rise or set!

– Examples: Ursa Major, Ursa Minor, Draco, Cepheus, and Cassiopeia

What happens over time in the Northern Sky?

Tutorial: Motion – p. 3

• Work with a partner!• Read the instructions and questions carefully.• Discuss the concepts and your answers with one

another.• Come to a consensus answer you both agree on.• If you get stuck or are not sure of your answer, ask

another group.• If you get really stuck or don’t understand what the

Lecture Tutorial is asking, ask one of us for help.

Your Birth SignROUGHLY, it is the constellation that the Sun is covering up during the day you are

born if you were born 2000 years ago.

Zodiac - The 13 Zodiacal constellations that our Sun covers-up (blocks) in the course of

one year (used to be only 12)

• Aquarius

• Pisces

• Aries

• Taurus

• Gemini

• Cancer

• Leo• Libra• Virgo• Scorpius• Ophiuchus• Sagittarius• Capricornus

The Zodiacal Constellations that our Sun covers-up

(blocks) in the course of one

year (only 12 are shown here)

North Star

365 days

1 dayAries

Pisces

Taurus

Gemini

Cancer LeoVirgo

Libra

Scorpius

Sagittarius

Capricornus

Aquarius

Figure 1

The Zodiacal Constellations that our Sun covers-up

(blocks) in the course of one year

(only 12 are shown here)

Which constellation would that be for the

situation shown?Pisces

Aries

Taurus

Gemini

Cancer

Figure 2 – What it would look like if you were the observer in Figure 1

South

North Star

365 days

1 day

Aries

Pisces

Taurus

Gemini

Cancer LeoVirgo

Libra

Scorpius

Sagittarius

Capricornus

Aquarius

Figure 1

Pisces

Aries

Taurus

Gemini

Cancer

Figure 2 – What it would look like if you were the observer in Figure 1

South

North Star

365 days

1 day

Aries

Pisces

Taurus

Gemini

Cancer LeoVirgo

Libra

Scorpius

Sagittarius

Capricornus

Aquarius

Figure 1

E W

W

E

What time is it for the observer?

What is the name of the constellation that would appear on the observers

Eastern Horizon? Western?

For more practice at this – Try Part I of the “Seasonal Stars” Lecture Tutorial

Pisces

Aries

Taurus

Gemini

Cancer

Figure 2 – What it would look like if you were the observer in Figure 1

South

North Star

365 days

1 day

Aries

Pisces

Taurus

Gemini

Cancer LeoVirgo

Libra

Scorpius

Sagittarius

Capricornus

Aquarius

Figure 1

E W

W

E

12 hours later what object will be at the position that Taurus is in

now?18 hours later where will the

Sun be? Where will

Scorpius be?For more practice at this – Try Part I of the “Seasonal Stars” Lecture Tutorial

Pisces

Aries

Taurus

Gemini

Cancer

Figure 2 – What it would look like if you were the observer in Figure 1

South

North Star

365 days

1 day

Aries

Pisces

Taurus

Gemini

Cancer LeoVirgo

Libra

Scorpius

Sagittarius

Capricornus

Aquarius

Figure 1

E W

W

E

Two months from the time shown

what constellation will be high in the Southern sky, at

Midnight? At Noon?

What sign will a person be if they are born at that

time?For more practice at this – Try Part I of the “Seasonal Stars” Lecture Tutorial