Course Announcements

1
Course Announcements

• Homework Scale of the Universe will be
  available on-line at the Mastering Astronomy (MA)
  website (masteringastronomy.com) on Thursday
• ASSIGNMENT 1 IS DUE SEPTEMBER 10th, 11 pm.
• These awesome presentations are available on my
  home server, http//evilo.dyndns.org/courses You
  should take a look at these as you begin to study
  for Test I.
• When is our first test?
• September 17...that's a Thursday in two weeks.

2
Course Announcements

• Homework Assignment 1 will be available
  on-line at the Mastering Astronomy (MA) website
  (masteringastronomy.com) by this evening. Due
  Monday night at midnight.
• These awesome presentations are available on my
  home server, http//evilo.dyndns.org/dolive/phys1
  04
• You should take a look at these as you begin to
  study for Test 1.
• So when is our first test?
• June 2...that's Tuesday next week.

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Did you get the Key Ideas from the Motion
Lecture Tutorial?
4
Imagine you are located in the Northern
Hemisphere and see a star directly
overhead(zenith). In what direction will you
have to look to see this star set?

• A) southwest
• B) west
• C) northwest
• D) This star will never set.

5
You are looking toward the north and see the Big
Dipper to the right of Polaris. Fifteenminutes
later, the Big Dipper will appear to have moved
in roughly what direction?

• A) east (to your right)?
• B) west (to your left)?
• C) up (away from the horizon)?
• D) down (closer to the horizon)?

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How much time is there between when a star rises
and when it sets?

• A) less than twelve hours
• B) about twelve hours
• C) more than twelve hours
• D) It depends on the star.

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So now we understand nightly motion. How about
weekly and monthly changes?
You go out tonight and see the brightest star in
the constellation Orion just rising above
youreastern horizon at 10 PM. One week later at
10 PM this same star will be
A) slightly higher in the sky. B) at the same
height as before. C) below your horizon. D)
setting on your western horizon.
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Astrology The belief that the positions of the
stars and planets as seen from Earth impact human
events.
These weekly and monthly changes lead to ...
Science or Pseudoscience?
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• Your Birth Sign
• ROUGHLY, it is the constellation that the Sun is
  covering up during the day you are born if you
  were born 2000 years ago.

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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

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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
• The actual constellation boundaries were drawn up
  by Eugène Delporte in 1930 then later approved by
  the IAU (International Astronomical Union).

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Use the Summer Triangle to find constellations
during summer evenings
15
Use the winter triangle to find constellations
during winter evenings
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Anyone recognize any shapes here?
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Islamic(ish) Star Names
Betelgeuse
Aldebaran
Rigel
SIRIUS
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Using Orion in to find other objects
Aldebaran
Sirius
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Seven Sisters
Subaru
Pleiades
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Using Orion in to find other objects
Aldebaran
Sirius
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Use the Big Dipper in the northern sky as a way
to find other groups of stars
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How to find stuff in the sky Star
Chartshttp//skymaps.com/http//www.fourmilab.
ch/yoursky/cities.htmlhttp//www.astro.wisc.edu/
dolan/constellations/constellationjavalist.html
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Tutorial Seasonal Stars p. 7

• 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 dont understand what
  the Lecture Tutorial is asking, ask me for help.

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Post Tutorial Question

• What component of Earths motion causes?the stars
  to rise earlier on successive nights?
• A) its rotation about its axis
• B) its orbit around the Sun
• C) the tilt of its rotation axis

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Post Tutorial Question

• One night, you see the star Sirius rise at
  exactly 736 PM. The following night it will rise
• A) slightly earlier.
• B) at the same time.
• C) slightly later.

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Post Tutorial Question

• One evening at midnight, you observe Leo high in
  the southern sky at midnight. Virgo is to the
  east of Leo and Cancer is to the west. One month
  earlier, which of these constellations was high
  in the southern sky at midnight?
• A) Leo
• B) Virgo
• C) Cancer

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GO CONFIDENTLY (To the Physics Lab) IN THE
DIRECTION OF YOUR DREAMS!! LIVE THE LIFE YOUVE
IMAGINED