AST 120 SPACE SCIENCE I:
This is possibly a changing document and has to be accessed often! current version AUG 26 2012
NOTE : Laboratory assignments are listed at the end of this webpage.
Syllabus: An Introduction to Astronomy and Astrophysics:
Prof. Irv Robbins (CSI-CUNY)
and cast of thousands! (special
thanks to Dr.
(special thanks to Dr.Jim Napolitano at RPI
for idea help and permission to use some of his
TEXT: Please purchase in bookstore.
The book has a website at http://www.astronomyaphysicalperspective.com/, a list of errata are found there and be sure to correct your text with them..
GRADE POLICY :
Grade AVERAGE = +25% HW + 20% Laboratory Assignments +10% Observing requirement+ 45%( Quiz+Midterm Exam + Comprehensive Final EXAM) + Extra Credit
On the EXAMS YOU ARE PERMITTED 4 PAGES (8X11) OF NOTES (FRONT AND BACK). BE SURE TO BRING A CALCULATOR
NO CELL PHONES!!!!
Most software in our laboratory is web based. Some exercises require you to finish them at home!
GENERAL LINK TO ALL CLEA EXERCISES (some of which we use):Gettysburg College Project CLEA
LECTURE PRESENTATION will be AVAILABLE IN PDF FORMAT: FOLLOW THE NEXT LINK (ADOBE READER NEEDED)
HOME WORK SOLUTIONS:
SOLUTIONS ARE AVAILABLE IN PDF FORMAT: FOLLOW THE NEXT LINK (ADOBE READER NEEDED)
When you instructed to finish the laboratory exercises hand them in for grading within one week you have an additional week grace until graded labs are returned. after that late exercises will be penalized significantly or not count at all=0!.
Written assignments below are due the week or session after they are given with no grace period The instructor will explain . Each assignment contains a reading in your text book, wiki readings and possible readings of prepared material that you download.
Ideally for each hour in class you should do a minimum of 2hrs at home..we meet 5 hrs a week so you should do at least 10 hrs of Homework per week. If you have study or time management problems please explore the following link found also at the observatory website, How to study science (astronomy in particular may be useful to you also)
IMPROVE YOUR STUDY SKILLS- READING COMPREHENSION and TIME MANAGEMENT
HOW TO STUDY ASTRONOMY
WHEN YOU SOLVE PROBLEMS YOU MUST SHOW ME THE STEPS YOU TOOK (IE THE DETAILED LOGICALLY STEPS THAT YOU USED TO ARRIVE AT YOUR ANSWER...PENCIL IS A MUST USE HERE.
AND CALCULATIONS AND ANSWERS SHOULD BE SOLVED AND PRESENTED IN SCIENTIFIC NOTATION with the UNITS. SCIENTIFIC NOTATION MEANS A SINGLE NUMBER FOLLOWED WITH A DECIMAL POINT AND DIGITS THAT ARE SIGNIFICANT AND MULTIPLIED BY THE APPROPRIATE POWER OF TEN. WHEN YOU SET UP A PROBLEM IN SCIENTIFIC NOTATION IT MAKE IT EASY TO USE YOUR CALCULATOR PROVIDED YOU KNOW HOW TO ENTER NUMBERS WITH POWERS AS ILLUSTRATED NEXT
EXAMPLES OF WHAT I AM LOOKING FOR 5.67 x 10-7 km 2.000 x 1013 kg 9 x 103 m/s
EXAMPLE OF DETAILED CALCULATION. YOU TRAVEL 3.0 X 106 km IN ONE YEAR. HOW FAST ARE YOU TRAVELING IN KM/SEC RATE = DISTANCE / TIME v=d/t 1 YEAR HAS ? SECONDS 60 X 60 X 24 X 365.25=31,557,600 s =3.1558 x 107 s
v=d/t= 3.0 X 106 km / 3.1558 x 107 s = 9.5 x 10-2 km/s
Assignment #1: The Universe (An overview and scale of the Universe )
READ: Preface and Chapter 1
READ AND EXPLORE: up to the "Theoretical models" section in wiki "Universe": http://en.wikipedia.org/wiki/Universe
label as HW #1 and Define the the Key terms from the readings above (you may have to google some of these!)
Physics, Radiative transfer, orbital mechanics, astronomy, astrophysics, astronomical unit, light year, parsec, kiloparsec, planet, solar system, Galaxy, Virgo Cluster, cosmology, Big Bang, dark energy, dark matter, space times, superclusters, cosmological principle, Olber's paradox,
from lecture & Laboratory exercise as well as questions from the lecture
HW TO NUMBER (2-10)TEN SEE THE POSTED LECTURE1 for additional info
SEE WARNING ABOVE IN SOLVING THESE
HW 2 How many earth Masses in the Sun?Solar radius =6 x 105 km
HW 3 How many Earth's fit across The Solar diameter?
HW 4 1 lsec=? km, lmin=? km, Ly =?km
HW 5 (use appendix to find distance in km of Sun and Moon) then
Distance to Sun = ? lmin, Distance to the moon=? lsec
HW 6 How many AU to Jupiter?
HW 7 Mars = ? lmin (Light Minutes (lmin or lm)) From the Sun?
HW 8 Mars = ? lmin from earth at closest approach to earth.
HW 9 Saturn is 10 AU to Sun = ? Lmin to sun?
HW 10 5 ly =? km
Assignment #2: Physics is Fun
READ: Study the Physics Part 1 lecture in the "Lecture Review" link above.
Read and explore entire WIKI article on Physics: http://en.wikipedia.org/wiki/Physics
SEE WARNING ABOVE IN SOLVING THESE
HW 11 : Dimensional analysis Newtons law of gravity. F=G Mm/r2
M and m are masses, r distance between masses, Force has unit kg x m/s2 (called
a NEWTON). What are the SI units of G?
HW 12: Which of the following is dimensional correct. Show why!
v=(L/T) a=L/T2 y or x =L k=2/L
HW 13: A lot is 100 ft x 150 ft = ? Square meters(m2)
HW 14: A piece of lead has a mass of 24.69 g and a vol of 3.5 cm3
Since density = mass/volume calculate the density in SI units (kg/m3)
HW 15: Radius of earth=6.37 x 106 m Radius of moon = 1.74 x 108 cm ( watch units!)
Given : Area of surface of sphere = 4pr2 Volume of sphere =4pr3 /3
Assignment #3: Physics is Fun
READ: Study the Physics Part 11 lecture in the "Lecture Review" link above.
note there are two HW sets for this assignment so read the appropriate parts for each.
SEE WARNING ABOVE IN SOLVING THESE
THE SECOND SET OF HW FOR PHYSICS II FOLLOWS
Assignment #4:Properties of Ordinary Stars-Radiation (Continuous) from the Stars:
READ: Chapter 2 sections as assigned in class and below for each part
notice: all HW problems that will be assigned in this chapter will be Problems #30-#41 spaced in four Parts A,B,C,D: some problems are the in class problems repeated below. Hand them in at the due dates assigned in class.
NOTE: PLEASE HAND IN HW WITH HW # AND CHAPTER AND PROBLEM NUMBER TO AVOID CONFUSION. HW WITHOUT A # WILL NOT BE GRADED!!
PART A: Read /Study 2-1,2-2: Problems 2.1(HW 30),2.2(HW31 ),2.3(HW32 )
+ BE SURE TO UNDERSTAND HOW TO DO THE in class Problem S1: What is the Frequency of a green photon whose Wavelength Is = 500 nm? How much energy does it contain?
PART B: HW Read/study sec 2-3 Problems 2.13(HW33 ),2.14(HW34 ),2.18(HW 35)
PART C HW Read/study sec 2-4 Problems 2.12(HW36 )
d = 10(mV – MV + 5)/5 pc
Part A: Read/study Chap 3 to 3.2
Questions 3.1(HW42),3.6(HW43)(these are not in the Problems section!)
SP 1 (HW44)Check on the web for stellar spectra then do Question 3.2
Sp 2 (HW45)Looking over the table "Abundances of the elements" in appendix G
A. how many times more abundant is Helium than sodium. (ie relative ratio).
B. In general what can be said of the abundances of elements heavier than iron.
C. Calculate the ration of iron to Uranium, iron to carbon and iron to iodine.
D. Does your values in C support what you said in B. Yes or no. Why?
Sp3(HW46). Check on the web for a periodic table. What do you expect the formula for the combination of Potassium(K) and Sulfur (S) to be?
Also the formula for Lithium (Li) to Flouride (F)?
PART C: Read/study section 3.4
Questions 3.9(HW56),3.10(HW57),3.11(HW58)Problem 3.10(HW59)
PART D; Read/study section 3.5
Questions 3.12(HW60), 3.13(HW61), 3.14(HW62)
Problems 3.17(HW63), 3.18(HW64), 3.19(HW65)
(HW66) Do example 3.3
Readings to follow in the HW's will be in sections 5.1-5.3
read 5.1,5.2 and look over key elements of 5.3
Study carefully examples 5.1,5.2 (solar mass defined!)
Questions: 5.3(HW67), 5.7(HW68)
Problems 5.1(HW69), 5.3(HW70), 5.6(HW71)
EXTRA CREDITS: 1. Derive Equation 5.20
2. if we cannot see both stars
how do we get R?
1 star finder
LABORATORY EXERCISE: Print up for the first session this week the Star Finder (this link) exercise and bring to class
FOR the NEXT week lab session (week 2): Look over and study the exercise math review found via this link.
2 math review
LABORATORY EXERCISE: Print up for this week the math review (this link) exercise and bring to class
FOR the NEXT week lab session (week 3): Look over and study the exercise found via this link. math with excel
3 math using excel
LABORATORY EXERCISE: Print up for this week the math with excel (this link) exercise and bring to class
FOR the NEXT week lab session (week 4): Look over and study the exercise Blackbody Spectra found via this link.
4 Black body spectra
Look over and study the exercise Blackbody Spectra found via this link.
FOR the NEXT week lab session (week 5): Go to CLEA WEBSITE and print up the student manual for the "Photoelectric Photometry of the Pleiades" exercise, READ THE INTRODUCTORY MATERIAL and bring to class next week lab session. Directly ACCESS by image link
5 photoelectric photometry
See last exercise for link for exercise from CLEA!
6 Forensic Atomic Structure (obtain here Forensic Atomic Structure ) How do we identify element here and elsewhere in the universe will be explored. To Identify elements you will use the Chart and the link Spectra of Gas Discharges.mht at this link you can click on a spectra to get a better resolution to see the actual wavelengths. Units are in Angstrom so divide by 10 to get nanometers. .