This seminar will explore one of a variety of subjects in greater depth than in introductory courses. Possible topics include stars, galaxies, the solar system, the interstellar medium, relativity and cosmology, history of astronomy, observational astronomy, and life in the universe.

The use of spectroscopy to diagnose physical conditions in optically thick objects is covered. Both continuum and spectral line formation (including NLTE) are treated. Modern research topics in this core area of astrophysics, like stellar atmospheres, star formation, and accretion disks, are used for illustration.

The story of the solar system. Topics include the solar nebula and modern observations of disks, the formation of the planets, planetary interiors and surfaces, planetary atmospheres and magnetospheres, and smaller bodies in the solar system. The physical processes at work are developed in some detail, and an evolutionary picture of each object is expounded. Some discussion of other (potential) planetary systems is also included.

Sophomore seminars are small interactive courses offered by faculty members in departments all across the campus. Sophomore seminars offer opportunity for close, regular intellectual contact between faculty members and students in the crucial second year. The topics vary from department to department and semester to semester. Enrollment limited to 15 sophomores.

In addition to the weekly colloquium, the Department offers seminars in advanced topics, several of which are announced at the beginning of each semester. A maximum of 5 units may be taken per semester with a limitation of 2 in any one section.

An introduction to the basic physics of astronomy and astrophysics at the graduate level. Principles of energy transfer by radiation. Elements of classical and quantum theory of photon emission; bremsstrahlung, cyclotron and synchrotron radiation. Compton scattering, atomic, molecular and nuclear electromagnetic transitions. Collisional excitation of atoms, molecules and nuclei.

A description of modern astronomy with emphasis on the structure and evolution of stars, galaxies, and the Universe. Additional topics optionally discussed include quasars, pulsars, black holes, and extraterrestrial communication, etc. Individual instructor's synopses available from the department.

Topics will vary with instructor.

The Astronomy colloquium is a forum for Astrophysics research talks to be given to the faculty and graduate students of the Astronomy Department.

Topics will vary from semester to semester. See department for announcements.