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George Smoot

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George Smoot

George Smoot
George Smoot at POVO conference in The Netherlands
Born George Fitzgerald Smoot III
(1945-02-20) February 20, 1945
Yukon, Florida, United States
Residence France
Nationality American
Fields Physics
Institutions UC Berkeley/Lawrence Berkeley National Laboratory/Université Paris Diderot-Paris 7
Alma mater Massachusetts Institute of Technology
Doctoral advisor David H. Frisch[1]
Known for Cosmic microwave background radiation
Notable awards NASA Medal for Exceptional Scientific Achievement (1992)
Kilby Award (1993)
American Achievement Golden Plate Award (1994)
E. O. Lawrence Award (1994)
Albert Einstein Medal (2003)
Nobel Prize in Physics (2006)
Gruber Prize (2006)
Daniel Chalonge Medal (2006)
Oersted Medal (2009)

George Fitzgerald Smoot III (born February 20, 1945) is an American astrophysicist, cosmologist, Nobel laureate, and one of two contestants to win the US$1 million prize on Are You Smarter than a 5th Grader?. He won the Nobel Prize in Physics in 2006 for his work on the Cosmic Background Explorer with John C. Mather that led to the "discovery of the black body form and anisotropy of the cosmic microwave background radiation," making Smoot the only Nobel laureate born in Florida.

This work helped further the Big Bang theory of the universe using the Cosmic Background Explorer (COBE) satellite.[2] According to the Nobel Prize committee, "the COBE project can also be regarded as the starting point for cosmology as a precision science."[3] Smoot donated his share of the Nobel Prize money, less travel costs, to a charitable foundation.[4]

Currently Smoot is a professor of physics at the University of California, Berkeley, senior scientist at the Lawrence Berkeley National Laboratory, and since 2010, a professor of physics at the Paris Diderot University, France. In 2003, he was awarded the Einstein Medal and the Oersted Medal in 2009.


  • Early life 1
  • Career 2
    • Initial research 2.1
    • COBE 2.2
    • Other projects 2.3
    • Public appearances 2.4
    • Media appearances 2.5
  • Selected publications 3
  • References 4
  • External links 5

Early life

Smoot was born in Yukon, Florida. He graduated from Upper Arlington High School in Upper Arlington, Ohio, in 1962. He studied mathematics before switching to the Massachusetts Institute of Technology where he obtained dual bachelor's degrees in mathematics and physics in 1966 and a Ph.D. in particle physics in 1970.[5]

Although Smoot attended MIT, he is not the Smoot who was laid end to end to measure the Harvard Bridge between Cambridge and Boston, creating the humorous Smoot unit of measure in the process.[6][7] This was in fact his cousin Oliver R. Smoot, an MIT alumnus who later served as the chairman of the American National Standards Institute.[7][8]


Initial research

George Smoot switched to cosmology and began work at Lawrence Berkeley National Laboratory, collaborating with Luis Walter Alvarez on the High Altitude Particle Physics Experiment, a stratospheric weather balloon designed to detect antimatter in Earth's upper atmosphere, the presence of which was predicted by the now discredited steady state theory of cosmology.

He then took up an interest in cosmic microwave background radiation (CMB), previously discovered by Arno Allan Penzias and Robert Woodrow Wilson in 1964. There were, at that time, several open questions about this topic, relating directly to fundamental questions about the structure of the universe. Certain models predicted the universe as a whole was rotating, which would have an effect on the CMB: its temperature would depend on the direction of observation. With the help of Alvarez and Richard A. Muller, Smoot developed a differential radiometer which measured the difference in temperature of the CMB between two directions 60 degrees apart. The instrument, which was mounted on a Lockheed U-2 plane, made it possible to determine that the overall rotation of the universe was zero, which was within the limits of accuracy of the instrument. It did, however, detect a variation in the temperature of the CMB of a different sort. That the CMB appears to be at a higher temperature on one side of the sky than on the opposite side, referred to as a dipole pattern, has been explained as a Doppler effect of the Earth's motion relative to the area of CMB emission, which is called the last scattering surface. Such a Doppler effect arises because the Sun, and in fact the Milky Way as a whole, is not stationary, but rather is moving at nearly 600 km/s with respect to the last scattering surface. This is probably due to the gravitational attraction between our galaxy and a concentration of mass like the Great Attractor.


Map of the CMB fluctuations found by COBE.

At that time, the CMB appeared to be perfectly uniform excluding the distortion caused by the Doppler effect as mentioned above. This result contradicted observations of the universe, with various structures such as galaxies and galaxy clusters indicating that the universe was relatively heterogeneous on a small scale. However, these structures formed slowly. Thus, if the universe is heterogeneous today, it would have been heterogeneous at the time of the emission of the CMB as well, and observable today through weak variations in the temperature of the CMB. It was the detection of these anisotropies that Smoot was working on in the late 1970s. He then proposed to NASA a project involving a satellite equipped with a detector that was similar to the one mounted on the U-2 but was more sensitive and not influenced by air pollution. The proposal was accepted and incorporated as one of the instruments of the satellite COBE, which cost US$160 million. COBE was launched on November 18, 1989, after a delay owing to the destruction of the Space Shuttle Challenger. After more than two years of observation and analysis, the COBE research team announced on 23 April 1992 that the satellite had detected tiny fluctuations in the CMB, a breakthrough in the study of the early universe.[9] The observations were "evidence for the birth of the universe" and led Smoot to say regarding the importance of his discovery that "if you're religious, it's like looking at God."[10][11]

Smoot celebrating his Nobel Prize at Lawrence Berkeley National Laboratory, 3 October 2006

The success of [15]

Other projects

After COBE, Smoot took part in another experiment involving a stratospheric balloon, Millimeter Anisotropy eXperiment IMaging Array, which had improved angular resolution compared to COBE, and refined the measurements of the anisotropies of the CMB. Smoot has continued CMB observations and analysis and is currently a collaborator on the third generation CMB anisotropy Planck satellite. He is also a collaborator of the design of the Supernova/Acceleration Probe, a satellite which is proposed to measure the properties of dark energy.[16] He has also assisted in analyzing data from the Spitzer Space Telescope in connection with measuring far infrared background radiation.[17]

Smoot is credited by Mickey Hart for inspiring the album Mysterium Tremendum, which is based, in part on "sounds" that can be extracted from the background signature of the Big Bang.

Public appearances

Shortly after being notified of his Nobel prize, Smoot appeared as the guest conductor of the University of California Marching Band as it presented a choreographed representation of the Big Bang at halftime of a football game. He followed his performance with a celebratory ramble through Memorial Stadium, greeted row by row and section by section with waves of applause. It was referred to as an "only in Berkeley" occasion.

Media appearances

Smoot had a cameo appearance as himself in "The Terminator Decoupling" episode of The Big Bang Theory.[18] He contacted the show as a fan of their often physics-based plots and was incorporated into an episode featuring him lecturing at a fictional physics symposium.[19] He is also credited by the producer of the show with providing a joke told by Penny in the episode "The Dead Hooker Juxtaposition".[20]

On September 18, 2009, Smoot appeared on an episode of the Fox television show Are You Smarter Than a 5th Grader?. During filming, he reached the final question, "What U.S. state is home to Acadia National Park?", to which he gave the correct answer "Maine", becoming the second person to win the one million dollar prize.[21]

On December 10, 2009, he appeared in a BBC interview of Nobel laureates, discussing the value science has to offer society.

Selected publications


  1. ^ Katherine Bourzac (12 January 2007). "Nobel Causes". Technology Review. Retrieved 2007-09-05. And Smoot himself can still vividly recall playing a practical joke on his graduate thesis advisor, MIT physics professor David Frisch. 
  2. ^ Horgan, J. (1992) Profile: George F. Smoot – COBE's Cosmic Cartographer, Scientific American 267(1), 34-41.
  3. ^ "The Nobel Prize in Physics 2006" (.PDF) (Press release). The Royal Swedish Academy of Sciences. 3 October 2006. Retrieved 2006-10-05. 
  4. ^ "Berkeley Nobel laureates donate prize money to charity" (PDF). Associated Press. 22 March 2007. 
  5. ^ "Nobelists' work supports big-bang theory" (Press release).  
  6. ^ George Smoot. "The SMOOT as unit of Length". Retrieved 2006-10-07. 
  7. ^ a b  
  8. ^  
  9. ^ Smoot, G.F.; et al. (September 1992). "Structure in the COBE differential microwave radiometer first-year maps". Astrophysical Journal 396 (1): L1–L5.  
  10. ^ Associated Press (April 24, 1992). "U.S. Scientists Find a 'Holy Grail': Ripples at Edge of the Universe". International Herald Tribune. p. 1. 
  11. ^ Thomas H. Maugh, II (April 24, 1992). "Relics of Big Bang, Seen for First Time". Los Angeles Times. pp. A1, A30. 
  12. ^ "Pictures of a Newborn Universe" (Press release). Royal Swedish Academy of Sciences. 3 October 2006. Retrieved 2007-09-05. 
  13. ^ Smoot, George; Davidson, Keay (1993). Wrinkles in Time. New York: W. Morrow.  
  14. ^ Mather, John; Boslough, John (1997). The Very First Light: The True Inside Story of the Scientific Journey Back to the Dawn of the Universe. New York: Basic Books.  
  15. ^ Lynn Yarris (26 October 2006). "After the Phone Call". Science@Berkeley Lab. Retrieved 2007-09-05. 
  16. ^ "Supernova/Acceleration Probe (SNAP)". Lawrence Berkeley National Laboratory. Retrieved 2007-09-05. 
  17. ^ "Spitzer Cosmic Far-IR Background Project". Lawrence Berkeley National Laboratory. Retrieved 2007-09-05. 
  18. ^ " 
  19. ^ "The Big Bang Theory Videos". CBS. Retrieved 2012-08-04. 
  20. ^ Lorre, Chuck. "Big Bang Theory Season 2 Episode 19 Vanity Card". Retrieved 2014-01-17. 
  21. ^ "Are You Smarter Than 5th Grader? Season 3 Ep. 27". FOX, Mark Burnett Productions. Retrieved 2009-09-26. 

External links

Smoot collaborated with


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