Washington, Chicago, NASA AMES, Cape Canaveral, & IAU Prague 2006

Mountain View, Tuscon, NASA AMES, Paris, & Boulder 2005

Bern ISSI, NASA AMES, Tucson, & Capri Cassini Workshop 2004

Jackson Hole, San Antonio, Tucson, & Boulder 2003

NASA AMES 2002

NASA AMES, Mountain View, & JPL 2001

Versailles 1996

1995 IAU Spaceguard Workshop

Ithaca 1994

Erice, NASA AMES, Lowell Observatory Pluto Meeting, & Lago Maggiore 1993

San Juan Capistrano Spectroscopy Conf & COSPAR 1992

Outer Planets Science Working Group 1991

JPL, Hawaii, & Ithaca 1990

JPL Voyager Neptune Encounter, & Moscow 1989

COSPAR, Hawaii Keck, and Moscow 1988

Hawaii Institute for Astronomy & Moscow 1987

COSPAR, JPL Voyager, Moscow, & Papal Audience Paris 1986

JPL CRAF, NEAR Workshop, Pasadena, & Mauna Kea 1985

Mauna Kea, Nice, COSPAR Graz, Mauna Loa, & Kilauea 1984

Hawaii, Pasadena, & JPL 1982

JPL Voyager & Cape Canaveral 1981

Satellites of Jupiter Conf, JPL, COSPAR, & Pluto Las Cruces 1980

JPL Voyager and Galileo, Asteroids, Comet Sci WG, & Pioneer Saturn 1979

Tuscon, Asilomar, Mauna Kea, Iowa City, & Chicago 1978

LPL Tuscon 1977

Tuscon, Viking, KAO, & Kitt Peak 1976

Moscow, Tuscon, Hawaii, NASA AMES, & KAO Dedication 1975

Kilauea, Ithaca, San Francisco AAAS, Mauna Kea, & NASA AMES 1974

Galileo Aircraft & Kilauea 1971

Catalina Observatory, Tuscon, & Kilauea 1970

IAU Symopsium Marfa, TX, McDonald Observatory, Ithaca, & Crimea 1969

Catalina Observatory, Tuscon, Observatoire de Paris, & Kilauea 1968

1967 & Earlier