List of Past Astronomy Colloquia : 01-Sep-1997 to 31-Dec-1997

Date:   Wednesday 10-Sep-97
Speaker:   Dr. Julian Krolik (Johns Hopkins University)
Title:  "Confrontation Between Observation and Theory for AGN Accretion Disks"

Date:   Wednesday 17-Sep-97
Speaker:   Dr. Anneila Sargent (California Institute of Technology)
Title:  "Resolved Disks around Young Stellar Objects"

Date:   Wednesday 24-Sep-97
Speaker:   Dr. Paul Schechter (Massachusetts Institute of Technology)
Title:  "The quadruply imaged gravitational lens PG1115+080: time delays and the Hubble constant."

Date:   Wednesday 1-Oct-97
Speaker:   Dr. Reinhard Genzel (Max Planck Institute for Extraterrestrial Physics)
Title:  "The Dark Mass at the Center of the Milky Way"

Date:   Wednesday 8-Oct-97
Speaker:   Dr. Kevin Rauch, Dr. Johannes Staguhn, Dr. Pierre Ferruit (Universtity of Maryland)
Title:  "New Postdoctoral Fellows' Round-robin"

Date:   Wednesday 15-Oct-97
Speaker:   No colloquium this week; October Conference

Date:   Wednesday 22-Oct-97
Speaker:   Dr. Bonnard Teegarden (NASA Goddard Space Flight Center)
Title:  "Gamma-Ray Bursts: Basking in the Afterglow"

Date:   Wednesday 29-Oct-97
Speaker:   Dr. Martin Harwit
Title:  "Water Vapor in the Galaxy: Observations with the Infrared Space Observatory, ISO "

Date:   Wednesday 5-Nov-97
Speaker:   Dr. James Moran (Harvard University)
Title:  "Sub-parsec Scale Warped Disks and Synchrotron Jets in Active Galactic Nuclei"

Date:   Wednesday 12-Nov-97
Speaker:   Dr. John Brown (Astronomer Royal of Scotland, University of Glasgow)
Title:  "Hard X-rays and Solar Flare Energy Balance"

Date:   Thursday 13-Nov-97
Speaker:   Seth Shostak (SETI Inst.)
Title:  The Hunt for Extraterrestrials

This Special Seminar is sponsored by the Department of Astronomy and the Terrapin Reading Society.


Could there be intelligent life elsewhere in the universe? Recent research indicates that hundreds of billions of other planets may be scattered throughout the vast starfields of the Milky Way. How many of these other worlds sport life able to send messages into space, or perhaps to travel between the stars?

In 1995, an ambitious scientific effort to search out distant civilizations by eavesdropping on their radio traffic got underway. Over the next five years, this effort, known as Project Phoenix, will use sophisticated digital receivers on large telescopes to probe the vicinities of nearby stars for a faint radio signal that would tell us we are not alone.

But what are the chances of success? Is Project Phoenix aiming its antennas at the most likely sites for life? Can Nature be expected to readily cook up interesting biology elsewhere? Even if alien life is common, is any of it intelligent? And finally suppose Project Phoenix succeeds: what then? World peace? Rioting in the streets? Would we learn the secrets of the ages, or merely find that we are small fry in heaven's vast expanse?

Date:   Friday 14-Nov-97
Speaker:   Dr. Rajesh Kochhar (Visiting Fulbright Lecturer Chicago Academy of Sciences and Indian Institute for Astrophysics, Bangalore)
Title:  "Western Science and the Indian Response"

This Special Seminar is presented by the Committee on History and Philosophy of Science and the Department of Astronomy.

Date:   Wednesday 19-Nov-97
Speaker:   Dr. Bo Reipurth (University of Colorado)
Title:  "Herbig-Haro Jets and their Energy Sources"

Date:   Wednesday 26-Nov-97
Speaker:   No Colloquium -- Thanksgiving

Date:   Wednesday 3-Dec-97
Speaker:   Dr. Scott Tremaine (Princeton University)
Title:  "The Centers of Elliptical Galaxies"

Date:   Wednesday 10-Dec-97
Speaker:   Dr. Malcom Longair (University of Cambridge)
Title:  "The 3CR Radio Galaxies Revisited"

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