Nobel Prize in Physics · 2017
Barry C. Barish
He rescued a struggling gravitational-wave project and built it into the observatory that first detected black holes colliding.
The Nobel citation: “for decisive contributions to the LIGO detector and the observation of gravitational waves”
- Born
- January 27, 1936, Omaha, NE, USA
- Shared with
- Rainer Weiss, Kip S. Thorne
- Affiliation at the time
- LIGO/VIRGO Collaboration; California Institute of Technology (Caltech), USA
Physics prize
2017
Shared with 2 other laureates.
Age that year
81years
Born in 1936.
Sources cited
18
Fact-checked September 24, 2026.
- As a teenager he wanted to be a novelist. He took his first physics course at Berkeley, because his high school offered none, and soon switched his major from engineering.
- His father's family ran a Ford dealership in Sioux City, Iowa, until they fell out with Henry Ford over Ford's antisemitic attitudes.
- He chose not to join a SLAC experiment he expected to be routine. It revealed quarks inside the proton, and three of his colleagues won the 1990 Nobel Prize for it.
- When he took charge of LIGO in 1994, it had failed two federal reviews and its construction was stalled.
- He founded the LIGO Scientific Collaboration, open to researchers anywhere. It grew to about 1,200 scientists in 18 countries.
The breakthrough
Turning LIGO from a struggling project into a working observatory
Einstein predicted that moving masses send ripples through space itself, but he thought the ripples were far too faint ever to measure. Rainer Weiss designed an instrument that might catch them: an L-shaped laser detector whose arms stretch and shrink by a tiny amount when a wave passes. Barish's job was to make that design real on a giant scale. When he took over in 1994, LIGO was a small Caltech and MIT effort whose plans had failed federal reviews. He rewrote the proposal, hired engineers from big physics projects, and won approval for what was then the most expensive project the National Science Foundation had ever funded. He oversaw building two observatories, in Washington state and Louisiana, each with arms 4 kilometers long. His key strategy was to build in two steps. The first version would prove the technology, while a research program developed an Advanced LIGO sensitive enough to make detections likely. Think of pouring a foundation strong enough for the house you plan to build later, not just the one you can afford now. Under his leadership LIGO switched to more powerful solid-state lasers and began developing active seismic isolation, which cancels ground vibrations much as noise-cancelling headphones cancel sound. He also founded the LIGO Scientific Collaboration, so researchers from any institution could join the search. On 14 September 2015, just as Advanced LIGO was starting its first observations, it recorded waves from two black holes that merged 1.3 billion years ago.[2],[3],[4],[5],[6],[9],[18]
“I found and developed the professional love of my life, physics, as an undergraduate in Berkeley.”
What it meant for humanity
LIGO gave people a new way to sense the universe. Until 2015, astronomers learned almost everything from light and other radiation, plus a few kinds of particles. Barish has pointed out that only about 4 percent of the universe gives off such radiation. Gravitational waves reveal events that give off little or no light, such as black holes colliding. In 2017 LIGO and Europe's Virgo detector caught two neutron stars merging, and about 70 observatories followed up. They saw freshly made gold and platinum, helping solve the puzzle of where about half of the elements heavier than iron come from. By 2025 the LIGO, Virgo and KAGRA network had recorded about 300 likely black hole mergers, and LIGO was catching roughly one every three days. A very clear 2025 signal gave the strongest evidence yet for Stephen Hawking's prediction that the total surface area of black holes cannot shrink. Barish's particular gift was organization. His LIGO Scientific Collaboration let scientists from any institution work on equal footing with those at Caltech and MIT, and it grew to about 1,200 members in 18 countries. Before LIGO, his particle experiments helped build today's picture of matter. His neutrino experiment at Fermilab was among the first to confirm the weak neutral current, a key prediction of the Standard Model of particle physics, after first evidence from CERN. His MACRO experiment in Italy gave confirming evidence that neutrinos change type as they travel. He served six years on the National Science Board, which oversees the National Science Foundation and advises Congress and the President. In his eighties he took teaching posts at UC Riverside and Stony Brook University.
- In August 2017, LIGO and Virgo detected two neutron stars colliding. About 70 observatories followed up and found newly made gold and platinum, helping explain where about half of all elements heavier than iron are made.[17]
- By September 2025 the LIGO-Virgo-KAGRA network had recorded about 300 black hole mergers, some still awaiting confirmation, and LIGO was catching roughly one every three days.[16]
- He founded the LIGO Scientific Collaboration in 1997 as an open, science-focused team. It grew to about 1,200 scientists and engineers at more than 100 institutions in 18 countries.[4],[7]
- His Fermilab neutrino experiment, led with Frank Sciulli, was among the first to observe the weak neutral current, a key prediction of the Standard Model, after first evidence from CERN.[3],[8]
- He speaks openly about impostor syndrome, saying almost anyone who thinks about it has it, and that a willingness to fail is probably the most important quality for getting things done.[13]
- In 2023 he received the US National Medal of Science for research on subatomic particles and for leading LIGO to the first detection of gravitational waves.[7]
Impact in numbers
Barish's contribution is a working instrument and the organization that runs it, not a product, so we record no quantified claims, as for his co-laureate Rainer Weiss. He turned a small, stalled Caltech and MIT effort into two observatories and a worldwide collaboration of more than a thousand scientists, and he planned from the start for the upgrade that made the first detection possible. That opened gravitational-wave astronomy: a way to study black holes and neutron stars through the shaking of space itself. The field has since tested predictions of Einstein and Hawking, helped show where gold and platinum are made, and catalogued hundreds of black hole mergers. Earlier, his particle experiments helped confirm the Standard Model. LIGO also pushed lasers and vibration control forward, but no credible figure ties a dollar value or a count of lives to his work, and inventing one would be dishonest. His open-collaboration model is a lasting legacy for how big science is organized.
Fundamental scienceSpaceTechnology
No number is given here on purpose. Some contributions cannot be counted honestly, and we would rather describe them than invent a figure.
The double edge
No harms are documented from Barish's work. It is basic research with no weapon or commercial product. The controversies concern money, people and credit. LIGO was the most expensive project in the National Science Foundation's history at the time. Barish's 1994 revision added about $100 million, bringing initial construction to almost $300 million, for a first instrument that its builders expected would probably need a later upgrade before it detected anything. Taking charge also meant sidelining others. The foundation approved replacing LIGO's founding director, Rochus Vogt, with Barish. In a 1998 interview Barish called his inability to find Vogt a workable new role a failure on his part. Finally, the Nobel Prize can go to at most three people, while LIGO's discovery rested on more than a thousand. Barish said the collaboration's roughly 1,200 members deserved shared credit. LIGO co-founder Ronald Drever died in 2017, before the prize was announced.
- Minor
A costly gamble on uncertain science
Barish's revised plan raised initial construction costs to almost $300 million, then the largest request the National Science Foundation had ever received, and he also sought support for research toward a later upgrade. Initial LIGO ran from 2002 to 2010 without detecting gravitational waves. The upgrade, Advanced LIGO, cost about $205 million more.[3],[4],[5],[18]
- Minor
A leadership change with casualties
Management conflicts had stalled LIGO, and the National Science Foundation approved replacing founding director Rochus Vogt with Barish. Barish later said he tried for years to find Vogt a new role, failed, and in the end put the project ahead of him.[9],[18]
- Minor
Three prizewinners for the work of a thousand
The Nobel Prize is limited to three people, but LIGO's discovery rested on more than a thousand scientists. Barish said the collaboration's members deserved shared credit. Co-founder Ronald Drever died in 2017, before the prize was announced.[4],[5],[12]
Against the odds
Compared with many laureates on this site, Barish grew up in safety, and we found no record of antisemitic barriers in his own career. His family's story, though, runs through hard years for American Jews. His grandparents came around 1900 from small Jewish towns in Eastern Europe. In 1924 the United States set immigration quotas that favored northern and western Europeans and disadvantaged people from eastern Europe, where most of Europe's Jews lived. In the 1920s Henry Ford used his newspaper to spread antisemitic conspiracy theories to hundreds of thousands of readers, and Ford dealers were required to hand out copies. Barish's father's family ran a Ford agency in Sioux City, Iowa, until they broke with Ford over his antisemitism. Barish was born in 1936, as antisemitism in the United States was rising and most Americans did not support easing immigration limits to help Jews fleeing Europe. At home, opportunity was limited. His father lost his own father at 10 and went to work young, and his mother's father would not let her use a university scholarship, so neither parent went to college. Barish, a shy boy without a mentor, found physics by chance at Berkeley. His later setbacks were professional: Congress cancelled the Superconducting Super Collider, for which he had spent years co-leading a detector design, and he inherited LIGO when it was close to being shut down.
—
Discrimination
His father's family ran a Ford agency in Sioux City, Iowa, until they fell out with Henry Ford over his antisemitism. In the 1920s Ford's newspaper spread antisemitic conspiracy theories, and Ford dealerships were required to distribute it.[3],[14]
1936
Discrimination
He was born as antisemitism in the United States was rising through the 1930s, when most Americans did not support easing immigration limits for Jews trying to flee Nazi Europe.[15]
—
Other
Neither parent went to college. His father lost his own father at age 10 and had to work young to support the family, and his mother's father would not let her take up a university scholarship.[3]
1993
Other
Congress cancelled the Superconducting Super Collider, ending years of his work co-leading the design of one of its two big detectors. He spent the following months helping the scientists he had hired find new jobs.[3],[4],[6]
1994
Other
He took over LIGO after it had failed technical and management reviews in 1992 and 1993 and was close to being shut down, with its funding held back by the National Science Foundation.[6],[9],[10],[18]
Jewish background
Both of Barish's parents came from Jewish families. In his Nobel autobiography he wrote that both families had emigrated around 1900 from small Jewish towns (shtetls) in Eastern Europe, in the area of today's Ukraine and Belarus. NobelPrize.org and the Jewish Telegraphic Agency describe the families as Polish, and in a 1998 interview he placed them in eastern Poland. His mother's family's social life in Omaha centered on the city's small, close-knit Jewish community. His father's family broke with Henry Ford over Ford's antisemitism. After his prize, Jewish newspapers profiled him and he spoke to the Jewish Journal of Los Angeles. We found no source on his religious practice.[1],[3],[9],[10],[11],[12]
Key dates
January 27, 1936
Born in Omaha, Nebraska, to a family of Jewish immigrant descent.[1],[3]
1946
About this time, after World War II, the family moves to the Los Feliz area of Los Angeles, where he attends public schools.[3],[7]
1957
Earns his bachelor's degree in physics at the University of California, Berkeley.[6],[7]
1962
Earns his PhD at Berkeley with a thesis on particle collisions at the 184-inch cyclotron.[2],[3]
1963
Joins Caltech as a research fellow, beginning a lifelong career there.[3],[7]
1972
Becomes a full professor at Caltech. In the early 1970s he and Frank Sciulli run a Fermilab neutrino experiment that is among the first to observe the weak neutral current.[3],[7],[8]
1993
Congress cancels the Superconducting Super Collider, whose GEM detector he co-led with Bill Willis.[3],[6]
1994
Becomes LIGO principal investigator, revises the project and, with Kip Thorne, wins National Science Board approval for construction.[4],[6]
1997
Founds the LIGO Scientific Collaboration and becomes LIGO director.[4],[6]
2005
Begins leading the global design effort for the International Linear Collider, a proposed particle accelerator, while staying involved in LIGO part-time.[3],[6]
September 14, 2015
Advanced LIGO makes the first direct detection of gravitational waves, from two merging black holes.[3],[5]
October 3, 2017
Awarded a quarter of the Nobel Prize in Physics, shared with Kip Thorne; Rainer Weiss receives the other half.[1],[2]
October 24, 2023
Receives the National Medal of Science at the White House.[7]
Sources
- 1.Barry C. Barish - Facts · NobelPrize.org (Nobel Prize Outreach)
- 2.Press release: The Nobel Prize in Physics 2017 · NobelPrize.org (Royal Swedish Academy of Sciences), 2017
- 3.Barry C. Barish - Biographical · NobelPrize.org (Nobel Prize Outreach), 2017
- 4.LIGO and the Discovery of Gravitational Waves, II (Nobel Lecture, 8 December 2017) · NobelPrize.org (Nobel Prize Outreach), 2017
- 5.Caltech Scientists Awarded 2017 Nobel Prize in Physics · Caltech, 2017
- 6.Barry C. Barish (archived copy) · Encyclopaedia Britannica, 2017
- 7.Two from Caltech Awarded National Medal of Science · Caltech, 2023
- 8.Nobel Laureate Barry Barish Appointed Stony Brook University President's Distinguished Endowed Chair in Physics · Stony Brook University News, 2022
- 9.Interview with Barry C. Barish (interviewed by Shirley K. Cohen, 1998) · Caltech Archives Oral History Project, 1998
- 10.Barry Barish Won Nobel By Being Great Scientist/Manager (Forward 50, archived copy) · The Forward, 2017
- 11.Q&A with Barry Barish on His Nobel Prize, and Why He Never Wrote That Novel · Jewish Journal, 2017
- 12.Scientist who fled Nazis among Nobel Prize in Physics winners · Jewish Telegraphic Agency, 2017
- 13.Nobel Laureate Barry Barish and His Imposter Syndrome · UCTV (University of California Television) blog, 2023
- 14.Antisemitism and Henry Ford's "The International Jew" · United States Holocaust Memorial Museum, Holocaust Encyclopedia
- 15.How did the United States government and American people respond to Nazism? · United States Holocaust Memorial Museum, Holocaust Encyclopedia
- 16.Ten Years Later, LIGO is a Black-Hole Hunting Machine · Caltech, 2025
- 17.LIGO and Virgo make first detection of gravitational waves produced by colliding neutron stars · LIGO Laboratory (Caltech), 2017
- 18.Got gravitational waves? Thank NSF's approach to building big facilities (Jeffrey Mervis; archived copy) · Science (AAAS), 2016
Fact-checked on September 24, 2026 by a separate AI fact-checking pass that re-opened the sources, with 11 corrections made. How we check
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