Geoffrey W. Marcy has been Professor of Astronomy and Adjunct Professor of Physics and Astronomy at the University of California, Berkeley and at San Francisco State University, respectively, since 1999. He is also Director of UC Berkeley’s Center for Integrative Planetary Science, which is designed to study the formation, geophysics, chemistry, and evolution of planets. Professor Marcy's research has focused on the detection of extrasolar planets and brown dwarfs. With R. Paul Butler, he directs the pioneering team at the Lick and Keck Observatories that has found the majority of known planets outside our solar system—70 out of the first 100 “exoplanets” to be discovered after 1996—as well as several dozen extrasolar planets that have allowed study of their masses, radii, and orbits. Professor Marcy also confirmed Michel Mayor and Didier Queloz’s discovery of the extrasolar planet 51 Pegasi b in 1995. His team discovered the first multiple-planet system around a sun-like star (Upsilon Andromedae), the first planet to block light from its star (HD 209458), and the first exoplanet to orbit more than 5 AU from its star (55 Cancri), as does our Jupiter. The team also discovered the first Neptune-sized planets and recently found the smallest known exoplanet, with a mass of 7.5 Earth-masses. He also co-discovered the first Neptune-sized planets, Gliese 436 and 55 Cancri. Professor Marcy’s ongoing research interests include discovering and characterizing systems of planets, discovering “Jupiters” at 5 AU and whether their orbits are circular or elliptical, and using space interferometry (NASA's SIM & TPF) to discover small planets. Professor Marcy received his Ph.D. in Astronomy and Astrophysics from the University of California, Santa Cruz (1982). Subsequently, he was a Fellow at the Carnegie Institution in Washington, D.C. (1982-1984). Before joining the UC Berkeley faculty in 1999, he was Associate-Full Professor of Physics and Astronomy (1984-1996) and then Distinguished University Professor (1997 to 1999) at SFSU. Professor Marcy was elected to the National Academy of Sciences (2002) and was awarded the prestigious Henry Draper Medal (2001), given every four years to individuals who have made a significant contribution to astronomical physics. He also received the Carl Sagan Award from the American Astronautical Society / Planetary Society and the American Astronomical Society’s Beatrice Tinsley Prize (both in 2002). Professor Marcy was named California Scientist of the Year (2000) and Discover Magazine’s Space Scientist of the Year (2003). He was awarded the NASA Medal for Exceptional Scientific Achievement (2003) and recently received the Shaw Prize in Astronomy (2005).


Recent publications



Fischer, D., Laughlin, G., Butler, P., Marcy, G., Johnson, J.  et al. (2005). The N2K Consortium. I. A hot Saturn planet orbiting HD 88133. Astrophys. J., 620, 481.

Laughlin, G., Marcy, G. W., Vogt, S. S., Fischer, D. A. and Butler, R. P. (2005). On the eccentricity of HD 209458b. Astrophys. J., 629, L121-24.

Marcy, G. W., Butler, R. P., Vogt, S. S., Fischer, D. A., Henry, G. W., Laughlin, G., Wright, J. T. and Johnson, J. (2005). Five new extrasolar planets. Astrophys. J., 619, 570M.

Tinney, C. G., Butler, R. P., Marcy, G. W., Jones, H. R. A., Penny, A. J., McCarthy, C., Carter, B. D. and Fischer, D. (2005). Three low-mass planets from the Anglo-Australian planet search. Astrophys. J., 623:2, 1171.



Butler, R. P., Bedding, T. R., Kjeldsen, H., McCarthy, C., O’Toole, S. J., Tinney, C. G., Marcy, G. W. and Wright, J. T. (2004). Ultra-high-precision velocity measurements of oscillations in alpha Centauri A.Astrophys. J. Lett., 600:1(2, Jan. 1), L75.

Butler, R. P., Vogt, S. S., Marcy, G. W., Fischer, D. A., Henry, G. W., Laughlin, G. and Wright, J.T. (2004). A Neptune-mass planet orbiting the M dwarf, GJ 436. Astrophys. J., 617, 580.

Marcy, G. W., Butler, R. P., Fischer, D. A. and Vogt, S. S. (2004). A Doppler planet survey of 1330 FGKM stars. In Extrasolar Planets, Today and Tomorrow, ASP Conference Series, 321, 3, ed. J.-P. Beaulieu, A. Lecavelier des Etangs and C. Terquem.

McArthur, B. E., Endl, M., Cochran, W. D., Benedict, G. F., Fischer, D. A., Marcy, G. W., Butler, R. al. (2004). Detection of a Neptune-mass planet in the rho-1 Cancri system using the Hobby-Eberly Telescope, Astrophys. J. Lett., 614, L81.

Wright, J. T., Marcy, G. W., Butler, R. P. and Vogt, S. S. (2004). Chromospheric Ca II emission in nearby F, G, K, and M Stars. Ap. J.S., 152, 261.



Carter, B. D., Butler, R. P., Tinney, C. G., Jones, H. R. A., Marcy, G. W., McCarthy, C., Fischer, D. A. and Penny, A. J. (2003). A planet in a circular orbit with a 6-year period. Astrophys. J. Lett., 593, L43.

Fischer, D. A., Butler, R. P., Marcy, G. W., Vogt, S. S. and Henry, G. W. (2003). A sub-Saturn mass planet orbiting HD 3651. Astrophys. J., 590, 1081.

Kjeldsen, H., Bedding, T. R., Baldry, I. K., Bruntt, H., Butler, R. P., Fischer, D. A., Frandsen, S., Gates, E. L., Grundahl, F., Lang, K., Marcy, G. W., Misch, A. and Vogt, S. S. (2003). Confirmation of solar-like oscillations in eta Bootis. Astron. J., 126, 1483.