SETI Institute

Home News About us SETI Carl Sagan Center Education and Public Outreach Publications Support us teamseti

Dr. Douglas Caldwell

December 20, 2006

“A Search for Extrasolar Planets from the South Pole”

NSF OPP–0126313

This project proposes to operate a small optical telescope at the South Pole to search for and characterize extrasolar planets. The method is to observe thousands of stars by continuously following a southern Galactic star filed with a CCD photometer, searching for the periodic dimming that occurs as a planet transits its parent star.The South Pole is the best place on the surface of the Earth to detect such planets because of the long winter night, during which randomly-phased transits can most efficiently be detected. Also, the constant altitude of a stellar field at the Pole avoids large daily atmospheric extinction variations allowing for higher photometric precision and a search for smaller planets. This project will increase tenfold the number of extrasolar planets for which transits are observed. Then, in conjunction with follow-on measurements from existing Southern Hemisphere Doppler velocity programs, planet densities can be determined. These data will provide information vital to theoretical models of planetary structure and formation.

Vulcan South - Antarctic Planet Finder