Astrobiology and the Search for Extraterrestrial Life
Astr 310
Spring 2013; MWF 10:00-10:50; Room GMCS 301; Section 1; Schedule # 20253
Instructor: Prof. William Welsh
Office: Physics Building, room P-235
Office Hours:
Mon, Tue, Wed 11:00-11:30; or by appointment
E-mail: astr310@rohan.sdsu.edu
Office Phone: (619) 594-2288 (emergency use only)
Web Site:
http://mintaka.sdsu.edu/faculty/wfw/CLASSES/ASTROBIO/astrobio.html
Required Books:
Life in the Universe, 3rd Edition, Bennett and Shostak
+ plus +
ASTR 310 Course Reader: Astrobiology
(Welsh, ed.) from the SDSU Bookstore
Prerequisites: Completion of GE requirement in Foundations II.A.1
Physical Sciences -or-
Foundations II.A.2 Life Sciences
Course Catalog Abstract: The search for extraterrestrial life
in our Solar System and other planetary systems;
the formation of stars and planets; UFOs and SETI;
origin and evolution of life on Earth; life in extreme
environments; cosmology and the structure of the Universe.
Course Description and Goals:
The past decade has seen an explosion of discoveries related to
astrobiology. For example, we now know of over 700 planets in orbit
around stars beyond the Solar System. We have also discovered that life
can thrive in environments that were once thought to be much too hostile
for life to survive. In this course students will learn about these new
discoveries and will develop an understanding of the size, structure,
origin, content, and physical laws governing the Universe.
Students will also learn some basics of Earth biochemistry, and will
use this knowledge to understand how astronomers are searching for
extraterrestrial life.
Emphasis will be placed on the importance of data and the testing
of hypotheses, as opposed to philosophy, beliefs, or doctrine.
Students will also develop their critical thinking skills and
explore topics in pseudoscience.
Outline of Topics:
The "Rules & Tools" of astronomy
The big bang, cosmology, and the size & structure of the Universe
Stars and planetary systems
The Earth and the biology/biochemistry of terrestrial life
Life in extreme environments
The search for extraterrestrial life in our Solar System: in
particular, Mars, Europa, and Titan
The discovery of planets around other stars and its significance
The Drake equation, SETI, and the search for extraterrestrial life
beyond the Solar System
UFOs and pseudo-science; developing critical thinking skills

Important Dates:
Note: Exam dates (except the Final Exam) are subject to change.
Exam #1: Friday March 1
Exam #2: Friday April 12
Final Exam: Friday, May 10, 10:30-12:30

Grading Policy:
All assignments must be typed and written in proper, college-level
English and stapled together. You can work with a partner, but the
homework must be done individually. Show all work for the problem-solving
questions. Homework is due at the start of class. Late homework loses 1
letter grade per class day overdue. Homework must be printed and turned
in: e-mailed homework will not be accepted.
Copying out of the textbook is plagiarism. Plagiarism may result in a
failing grade for the homework assigment and possible other penalties,
including failing the course.

20% Written Homework Assignments
(three assignments ; 2-3 typed pages each)
25% Exam #1 (multiple choice format)
25% Exam #2 (multiple choice format)
30% Final Exam (comprehensive; multiple choice format)
+ few % discretionary bonus for class participation, etc.

Exams will be graded on a mild curve.
You will need ParScore Enrollment scantron forms.
No make-up exams will be allowed unless there is a serious, legitimate
reason (e.g. medical emergency) and full documentation. If a make-up
exam is deemed appropriate, an oral or essay exam may be administered
instead of, or in combination with, multiple-choice questions.
No extra credit projects will be accepted.*
See class webpage for details about homework, grading, incompletes,
and plagiarism policies.

Class Website:
The class website is an important part of this course. Be sure to
frequently refer to the website and links therein. Like the textbook, the
links on the website will help you get the most out of this course. Homework
assignments, lecture notes, and important class news will be posted on the
website.
Lecture Notes:
Most lectures have notes that will be available on-line a few days
before the lecture. Download, print, and bring the notes to the lectures.
The class notes expire after the lecture on that topic is given and
will no longer be available.
Class Attendance and Expectations:
Attendance is not mandatory, but be aware that much of the course material
is not contained in the textbook/reader. It will be much easier to
earn a good grade if you come to class.
It is expected that you will attend all the lectures, read all the
material assigned for homework - including the web pages assigned, and
participate in class (e.g. ask questions, contribute to discussions,
etc.). I expect you to come to office hours for help or for
addition discussion.
Mathematical Skills:
The mathematics will be kept to a minimum, but for some concepts a
quantitative understanding is as important as a qualitative
understanding. We will be using the metric system, scientific
(exponential) notation and simple algebraic relations.
Classroom Rules:
To maintain a professional atmosphere and to respect your fellow
classmates, the following is prohibited:
- Cell phones: please turn off the ringers!
- Using a laptop for anything other than class-related work
- Using a cell phone for texting
- Handing in homework after the lecture starts
- Reading newspapers, magazines, etc., or doing homework for this or any
other class
- Eating or drinking anything in the classroom
- Talking above a whisper; Loud snoring...
General Philosophy:
This class should be fun and rewarding, but it's not an easy class. What
you get out of this class is directly proportional to the effort you put
in. I do not assign grades; rather, I simply report the grades the
students earn. I would be absolutely delighted to report
an excellent grade for everyone - but that's entirely up to you.
The lectures and all material contained therein, including web
pages and on-line lecture notes, are copyrighted - no material can be
reused or reproduced in any fashion without written permission.