AST 161 STUDY GUIDE FOR FINAL EXAM

This file has been revised;  last edited on 05/07/2014 at 16:05

NOTE:  THE FINAL EXAM IS ON:  May 9, at 10:30, IN ROOM SCP-117.

Study everything on the study guides for all previous tests, even the one for test 4, though we did not
have test 4.

Go over all previousl tests, quizes and lab reports.  Don't make the same mistake twice.

Study all previous lab exercises, including Exs. 1.0, 2.0, 5.0, 5.2, 6.0, 7.0, 7.2,13.0, 14.0,
15.0, 15.1, 17.0, 17.1, 18.0, 18.7, VA  21 & 27.0.

Be sure to read the introduction sections of all the lab exercises thoroughly, including
Ex. 13 on the Moon,  Ex 14.0 on eclioses, Ex. 15.0 on planetqary elongations,
Ex. 17.0 on stellar parallaxes, 17.1 on proper motion,  Ex. 18.0 on magnitudes,
Ex. 18.7,  VA Ex 21, VA 27, & Ex. 20.0 on Doppler shifts.

Study thoroughly my Chapters 1 thru 14 found on my website and the documents TIME,
Lunar Motion & Eclipses, Quasars  and  Stars & Cosmology Review.

Do all of the assigned readings in the textbook by  Schneider and Arny.

Historical aspects of astronomy: Know who did what and when for such people as;
Hipparchus, Copernicus, Galileo, Kepler, Brahe, Newton, Adams & Leverrier, Herschel, Shapley, Planck,
Leavitt, Stefan & Boltzmann, Wien, Russell, Hertzsprung, Kumar, Einstein, Baade, Chandrasekhar,
Schwarzschild, Lamaitre, Gamow, Schmidt, Kerr, and Hubble.

Some Important Topics:

Orbital properties of the planets. Terminology and properties of elliptical orbits. Kepler's laws of planetary motion.

Planetary orbits, elongations, aspects, and configuration for inferior and superior planets.  Phases of the Moon
and Eclipses.

Comparative chemical compositions of the Sun, Earth, and Jovian Planets.

General physical properties of 3 different kinds of planetary bodies.
Gross Characteristics of Planets. Know atmospheric compositions.

Lunar surface features, terminology, and the history and chronology of its evolution as determined from the ages
of lunar rocks.

Physical Properties of the planets:

Lesser Solar Satellites of the Sun: Minor planets, Meteoroids, and Comets.

Know the differences and similarities among meteoroids, meteors, and meteorites.

For comets, know:

1. Properties of orbits

2. Parts of and changes in, while moving in orbit.

3. Know what the Oort cloud and Kiper Belt are and where they are located.

Different kinds of meteorites, and ages. Parent Body theory for origin of various meteorites.

Origin of Solar System (Chapter 4 on my web site)

1.    Accretion theory and evidence for its validity
2.    Dynamic collapse of solar nebula: Gravitational
        contraction and rotational flattening
3.    Chronology of the formation and evolution of the planets.
4.    Planetesimals and protoplanets
5.    Gravitational sweeping and the great meteoroidal
        bombardment
6.    Heating mechanisms for the planets, internal and external.

The following is a summary of the sequential steps or stages in the formation
and evolution of a plnaetary body:
1. Accretion of dust particles to form grains, then clumps and then planetesimals.
2. Planetesimals collide and grow larger.  The interiors are heated and melted  by energy released
    from the decay of short lived radioactive isotopes.
3. Large plameteismals are able to grow even larger by graviational sweeping.
4. Gravitational sweeping causes large planetesimals to grow to become protoplanets.
5. Gravitational sweeping results in an intense meteoroid bombardment that completely melts the
        outer layers of a planet.
6. After a planet has swept up most of the material in the vacinity of its orbit, the bombardment abates
        and the planet's surace begins to cool and form a solid crust.
7.  Any meteoroid impacts now leave permanent craters.
8.  An occasional impact by a large asteroid/meteoroid produces a basin then fills with molten rock
        and destroys all previous craters in that area.  This is how the maria of the Moon formed.
9.  Further cooling of the outer layers may result in cracks that allow lava to flow from the interior
            into the basin regions.
10.  There may now be an occsaional impact that produces a crater in the lava plains.
11.  Subsequent erosion will now wear down the craters and mountains that have formed depending
            on the severity of the erosion..
12.  The last event is always the cooling of the interior of the planet, though large planets like the Earth still have
            a molten interiorsthat results in volcanoes.

Eclipses:
Necessary conditions for an eclipse to occur, types, eclipse limits, eclipse seasons, regression of the LON.
Regression of the LON results in the eclipse seaons coming earlier each year by
2.7 weeks or 19 days.

Laws of radiation and spectroscopy, Spectral Classes, absolute and apparent magnitudes, and
the H-R Diagram.

Stellar Evolution: Know the chronological order of the different stages as on test 3.

Star Clusters, Galaxies, Quasars, Hubble's Law, the expanding universe, the primordial atom, chronology of the
Fireball Explosion, and Cosmology.

A partial list of definitions to know:
Perihelion and aphelion.
Conjunction, quadrature, opposition.
Accretion, solar nebula, dynamic collapse, planetesimal,
chondrite, chondrule, achondrite.
Umbra and penumbra.
Chandrasekar and Kumar limits
Schwarzschhild limit or critical radius
Quasars

Be familiar with or know:

1. Calculation of time for planetary events;     TP = Tsun - TE

2. Table of times for corresponding solar events to be used in above equation.

3. Who discovered what planet, when, and how.

4. How to measure elongation in the plane of a planet's orbit(Ex.15.0).

5. How to determine the phase of the Moon from its elongation.

6. Know  LAT = HAsun + 12:00

7.  Know when a colon or decimal point should be used.  Note: any calculation done with a calculator is decimal
     and this must then be converted to sexagesimal.    Note:  13:30 is the same as 13h 30m, for time, HA, or
     RA, but 13.33 hours or degrees (decimal form) is the equivalent of 13:20 (sexagesimal).

8. The Moon rises/makes UT/sets 50 minutes later each day. This is related to the fact that the Moon's apparen
    motion in the sky is 12.2 deg/day relative to the Sun.

9. The Moon moves 13.2 deg/day, eastward, relative to the fixed stars as a result of its orbital motion around
    the Earth.

10.  Planetary classifications: superior, inferior, inner, outer, major, minor, terrestrial, giant/jovian, and icy.

11.  Always label an hour angle or elongation as east or west.   Things that need not be labeled as to direction
        are RA, Azimuth, LAT, or ZT.

12.    Laws:
        Law of gravity, Newton's 3 laws of motion,
        Kepler's 3 laws of planetary motion, Stefan-Boltzmann law, Wien's Law,
        Planck's Law,
        Mass-Luminosity law,  Period-Luminosity law,  and Hubble's law.
        The cosmolgical principle.

13.  Stellar evolution and stelllar evolutionary tracks such as shown in the diagram at the end of my Chap. 8
        Also study  Figs. 11-4, 11-8, 12-7, 12-10,& 12-11 in Seeds.

14.   Study the diagrams on pages 558 and 559 in S&A on the ages of star clusters.   This is related to the
        discussion in my Chapter 9 on galaxies.

15.   Be able to do a problem in the spectroscopic parallax method as in Ex. 18.7 and Ex. 27.

16.   Be able to determine the color index of a star and relate this to its surface temperature.

Questions to Answer

Any of the following could be on the final exam in addition to questions asked on the
previous tests.  (Also see the questions for the other test reviews):

Celestial Sphere:

        Identify the equinoxes and solstices and where the Sun is at different times of the year in Fig. 1 of Ex. 7.0.
        The great cirlcle on the celestial sphere that is everywhere 90 degrees from the zenith is what?
        The great cirlcle on the celestial sphere that is everywhere 90 degrees from the celestoal poles is what?
        Define hour angle, altitude, azimuth, declination, elongation, and right ascension.

Solar System:

01.    What are the differences between the terrestrial and giant planets?
02.    Which planets have rings?
03.    Why are the rings of Saturn so conspicuous?
04.    Why are there fewer craters on the lunar maria than in the lunar highlands?
05.    How did the lunar maria form?
06.    What is the main difference in the crustal makeup of the inner planets compared
         with the planetary satellites in the outer regions of the solar system?
07.    What is the Oort cloud?
08.    What is the age of meteorites?
09.    What is the solar nebula?
10.    What is meant by the dynamic collapse of the solar nebula?
11.    What is the main idea of the accretion theory for planetary formation?
12.    What two forces acted in the solar nebula to cause the dust particles to grow
         into planets?
13.    What are two sources of heat that caused the larger planets to become completely
         molten?
14.    How long ago did the great meteoroid bombardment end and how do we know this?
15.    Why are there differences in cratering on the different planets and satellites?
16.    List, in chronological order, the different stages in the growth and evolution of the
        planets.  See "Origin of the Solar System" for the above.
18.    What is meant by "gravitational sweeping" and what role did it play in planetary
        formation?
19.    How long did it take for dust particles to form planetesimals?
20.    How do planetary bodies lose heat into space or cool?
21.    Why are some planetary bodies irregular in shape and others are not?
22.    Who discoverdthe planet Uranus and when?
23.    What is Kepler's 1st Law of Planetary Motion?
24.    Who made the most precise observations before the use of the telescope?
25.    Where are the ring systems of the giant planets located with respect to the large moon
                 of the planet?
26.   The amount of time it takes the Moon to move 360 degrees in its orbit around the barycenter of the
                  Earth-Moon system is called the what?
27.   Wht is the name of the largest asteroid?
28.   Which planetary bodies have active volcanoes and which body is the most active?

Stars

01.   How many stars are their in the solar neighborhood?
02.   How is the distance determined for a star closer than 100pc?
03.    Define absolute magnitude.
04.    In the H-R Diagram, why are most stars found to define a locus called the main sequence?
05.    What are the physical differences between white dwarfs and red dwarfs.
06.   What are the defining characteristics of main sequence stars?What is the mass-luminosity law and for
            what stars is this valid?
07.   After a star like the Sun evolves to become a red giant, what is the next TNF reaction to occur in the core?
08.   What important effect do massive stars have on the galactic interstellar medium?
09.    What is a brown dwarf?
10.    What are T Tauri stars?What are the physical properties of neutron stars?
11.    What stage of evolution follows the main sequence stage for the Sun?
12.     What is the final stage of evolution for the Sun?
13.     How can a star with a mass 10 times the Sun's become a white dwarf star?
14.     What is the relationship between the age of a star and its chemical composition?
15.     What is the difference between Type Ia and Type II supernovae?
16.     In the general theory of relativity, what is gravity?
17.    In the general theory of relativity, why is ligth affected by gravity?

19.    Given the radial velocity diagram for a binary star system, be able to determine the gamma-velocity of the
            the system and the mass ratio as in Ex. 20.

From the Readings in the textbook:
What is a Type Ia supernova?
What is a RR Lyrae star?
What is a Cepheid variable star?

Galaxies and Cosmology:
What is a galaxy?
What are the physical properties of the two different kinds of star clusters?
Be able to determine the relative ages of the star clusters that are displayed in a composite H-R Diagram.
In a compositye H-R diagram for star clusters, what is the significance of the main sequence "turn-off" point?
Why would we not expect to find planetary systems around the first generation of stars that formed in the Galaxy?
How is the period-luminosity law used to determine distance?

  • What is the cosmological significance or meaning of the Hubble constant?
  • What is the difference between Hubble's Law and Hubble's conclusion?
  •  What important event happened in the universe 400,000 years after the Big Bang?
  • When did TNF reactions begin and end in the early universe?
  • What is the pristine chemical composition of the universe?
  • When after the big bang did very massive stars and small protogalaxies begin to form ?

  • What is the evidence for the presence of much dark matter in the universe?
    Why do astronomers need to invoke the presence of what is called "dark energy" in the universe?

    What type of supernovae were used to determine the distances to very distant galaxies and therefore the discovery of the
       accelerating expansion of the universe?
     What are "quasars?"
    Wht is synchrotron radiation and how does in differ from thermal radiation.  Read in textbook and refer to my notes given
      in class.
    Who was the astronomer that first mesured the distance of a quasar?
    How do astronomers explain the enormous luminosities of quasars?
    What is the pristine chemical composition of the univere and when was it formed?

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    Be able to analyze a normalized light curve as in Ex, 18.5
     Be able to analze a radial velocity diagram for a binary star as was done in Ex. 20.