We know this can be a confusing problem, so we will try to explain the intended audience for our five introductory non-majors courses and for our two upper-division astrophysics courses. This is the "plain English" description of these courses: see the official Schedule of Classes and Course Catalog for definitive language, and consult your adviser if you have any questions about how these courses fit into your curriculum.

## Introductory Non-Majors Courses

The Astronomy Department offers 6 introductory-level courses for non-majors that satisfy the General Education (GE) physical sciences requirement:

**Astronomy 1101**: From Planets to the Cosmos (4 cr: 3 cr Lecture + 1 cr Lab)**Astronomy 1102**:**Online**version of Astronomy 1101*without*the lab (3 cr)**Astronomy 1140****:**Planets and the Solar System (3 cr)**Astronomy 1141:**Life in the Universe (3 cr)**Astronomy 1142:**Black Holes (3 cr)**Astronomy 1143:**Cosmology: History of the Universe (3 cr)**Astronomy 1144:**Stars, Galaxies, and the Universe (3cr)

These are single-term courses devoted to particular current topics in modern astronomy from the solar system to the entire universe. They are designed for non-majors seeking to satisfy their Natural Sciences GE requirement. Note that these courses are *not* a sequence: they may be taken singly or multiply in any order.

One of these courses, Astronomy 1101, includes a required 1-hour lab section that satisfies the GE natural sciences laboratory requirement. Astronomy 1102 is an online-only version of Astronomy 1101 *without* the lab component. The Astronomy 1140 to 1144 courses are all 3-hour GE courses with only a lecture section. All of these courses are taught at the same basic level.

## Introductory Astronomy & Astrophysics Majors Courses

The introductory courses for Astronomy and Astrophysics majors and minors are as follows:

**Astronomy 2291**: Basic Astrophysics & Planetary Astronomy (3 cr)**Astronomy 2292**: Stellar, Galactic, & Extragalactic Astronomy & Astrophysics (3 cr)**Astronomy 2895**: Introductory Seminar (1 cr)**Astronomy 3350**:

### Astronomy 2291-2292: Introductory Astrophysics Sequence

This is a general survey of astrophysics, but unlike the 1000-level courses, these are intended *primarily* for physical sciences majors (especially Astronomy & Astrophysics majors and minors, for whom these are *required*). These can also be taken as GE courses for those who are interested in a more mathematical approach to the subject. Students who enroll in these courses are expected to have already taken a year of college-level calculus (through Math 153, 1152, 2162, 2173, or equivalent) and at least one year of classical physics, either completion of or concurrent registration in Physics 133, 1251, or equivalent.

### Astronomy 2895: Introductory Seminar

This is a 1-credit course taught only during the Autumn Semester. It consists of a single session once per week during which a different member of the astronomy faculty will discuss their research. It is intended to give those students considering becoming Astronomy & Astrophysics majors or minors a broad overview of the current research topics in the department. Normally taken by first- and second-year students, it is open to anyone considering majoring or minoring in astrophysics.

### Astronomy 3350: Methods of Observational Astronomy & Data Analysis

Unlike the courses listed above, this is a course designed primarily for Astronomy & Astrophysics majors and minors, or for very technically-inclined Bachelors of Science students. Astronomy 3350 concentrates on the statistical treatment of experimental data as applied to astrophysical problems (photon detection and the analysis of ensembles of data). Although specific to observational astrophysics, the methods developed in this course will be applicable to any of the physical sciences or engineering disciplines. Prerequisites include Astronomy 2392 (or Astronomy 2162H in *very exceptional cases*), Math 153, 1152, 1262, 2173, or equivalent, and Physics 133, 1251, or equivalent. Interested students who are not astronomy majors/minors and/or who have not taken the Astronomy 2291/2292 sequence must speak with the instructor before enrolling in this course.

## Upper Division Courses

In addition to the introductory sequences, there are two higher-level astrophysics courses that do not have astronomy prerequisites. These are no-nonsense astrophysics courses that are intended primarily for Astronomy & Astrophysics majors/minors, as well as for physics majors/minors or graduate students in physical sciences other than astronomy. Astronomy & Astrophysics majors are required to take at least *one* of these courses, but may (and are encouraged to) take the other as a free elective. These courses are taught in the Spring Semester in alternate years. Prerequisites for both courses are differential equations (Math 255, 415, 2255, 2415, or equivalent) and basic quantum physics (Physics 253, 2301, or equivalent); completion of or concurrent registration in statistical physics (Physics 621, 5600, or equivalent) is also recommended, but not required.

### Astronomy 5681:

Principles of Stellar Evolution & Nucleosynthesis.

This course provides an in-depth exploration of the structure and evolution of stars, including nucleosynthesis in stellar interiors and in supernova explosions. The equations of stellar structure are derived from first principles, and the case of degenerate objects is also treated. Topics covered in detail include radiation transport mechanisms, nuclear reactions, and stellar evolution. This course is offered during the Spring Semester in *even-numbered* years.

### Astronomy 5682:

Introduction to Cosmology.

This course provides a comprehensive introduction to standard Big-Bang cosmology, including an introduction to the General Theory of Relativity. Solutions to Einstein's equations are derived. The structure and evolution of the Universe are studied through the Friedmann equations, including the possible role of the cosmological constant. The early thermal history of the Universe, including primordial particle physics, nucleosynthesis, and the cosmic background radiation, are explored in detail. The very early Universe, including inflation and quantum cosmology and the origin of density fluctuations, is discussed and observational tests of cosmological models are described. This course is offered during the Spring Semester in *odd-numbered* years.