{"type":"people","slug":"david-spergel","title":"David Spergel","url":"https://disclosdex.com/people/david-spergel","description":"Astrophysicist whose NASA UAP study role brought data standards into a disputed public evidence problem","date":"2022-06-09T00:00:00.000Z","tags":["Astronomer"],"updated":"2026-05-18T11:31:25.000Z","disclosureRating":7,"connectionCount":7,"content":{"markdown":"David Nathaniel Spergel is a cosmologist, astrophysicist, science administrator, and president of the Simons Foundation who chaired NASA's independent study team on UAP.[^1][^2][^3]\n\n## Cosmology Before UAP\n\nThe Shaw Prize's 2010 brochure says Spergel was born in 1961, earned a Ph.D. in astronomy from Harvard in 1985, and shared the 2010 Shaw Prize in Astronomy with Charles L. Bennett and Lyman A. Page Jr. for leadership of the Wilkinson Microwave Anisotropy Probe experiment.[^1] Princeton's curriculum vitae records an A.B. from Princeton in 1982, a Harvard Ph.D. advised by William H. Press in 1985, a postdoctoral appointment at the Institute for Advanced Study, and Princeton faculty appointments from assistant professor in 1987 through Charles A. Young Professor of Astronomy emeritus after July 1, 2019.[^2]\n\nThe MacArthur Foundation described him in 2001 as a theoretical astrophysicist whose work concerned the origin, structure, and future evolution of the universe, and identified him as principal theorist for [NASA's](/organizations/nasa) Microwave Anisotropy Probe.[^4] The American Academy of Arts and Sciences lists David Nathaniel Spergel as an astrophysicist, cosmologist, and educator elected in 2012, and credits his WMAP work with changing understanding of cosmology and future tests of fundamental physics.[^5]\n\n## Princeton, Flatiron, Simons\n\nSpergel's institutional roles moved from Princeton astronomy into computational science and philanthropy.[^3][^6] Princeton lists him as emeritus professor of astrophysical sciences and emeritus Charles A. Young Professor of Astronomy on the Class of 1897 Foundation, with work on microwave-background data from WMAP and the Atacama Cosmology Telescope and a role as co-chair of the WFIRST science team.[^6] The Simons Foundation profile says he joined the Flatiron Institute in 2016 as founding director of the Center for Computational Astrophysics, became president of the Simons Foundation in 2021, and retired from Princeton after 30 years while remaining an emeritus professor and mentor.[^3]\n\nPrinceton reported in 2022 that Spergel received a second NASA Exceptional Public Service Medal for leadership of the Nancy Grace Roman Space Telescope teams during concept and formulation, after a 2017 medal connected to his service on the Space Studies Board and NASA Advisory Council.[^7] An American Institute of Physics oral-history catalog summary separately identifies his involvement in WMAP, the Roman Space Telescope project, and congressional advocacy for NASA.[^8]\n\n## Why NASA Chose Him\n\nSpergel's UAP role began as a NASA science-methods assignment.[^9][^10] On June 9, 2022, NASA announced a new study team to examine unidentified aerial phenomena from a scientific perspective and named Spergel, then president of the Simons Foundation, as the study lead.[^9] NASA also stated at the launch that UAP were observations that could not be identified as aircraft or known natural phenomena, that the topic mattered for national security and air safety, and that there was no evidence UAP were extraterrestrial in origin.[^9]\n\nNASA formalized the [NASA UAP Study Team](/programs/nasa-uap-study-team) on October 21, 2022, selecting 16 participants and saying the nine-month study would begin on October 24.[^10] The agency said the team would use unclassified data, identify how civilian government, commercial, and other data could be analyzed, and recommend a roadmap for future NASA analysis rather than validate or solve individual historical cases.[^10] NASA's member announcement named Spergel as chair and described his relevance through Simons Foundation leadership, Flatiron work, cosmology, and more than 100,000 citations.[^10]\n\n## The Study He Actually Chaired\n\nNASA's UAP page says the study focused on available data, future data collection, and how NASA could move scientific understanding of UAP forward; it also lists eight task questions about civilian, commercial, nonprofit, airspace, reporting, analysis, and physical-constraint data.[^11] The final [2023 NASA UAP study report](/documents/2023-nasa-uap-study-report) says the team was asked to identify available data and produce a roadmap for usable data going forward, and explicitly states that the report was not a review of previous UAP incidents.[^12]\n\nThe report's main evidentiary finding was a data-quality problem.[^12] It said the absence of consistent, detailed, curated observations meant NASA did not have the body of data needed for definitive scientific conclusions about UAP, and it warned that eyewitness reports alone are not reproducible and usually lack enough information to determine provenance.[^12] Its executive summary also identified poor sensor calibration, lack of multiple measurements, lack of sensor metadata, and lack of baseline data as barriers to analysis.[^12]\n\nThe report placed NASA in a supporting scientific role within a broader government system led by [AARO](/programs/aaro).[^12] It said AARO led the whole-of-government response while NASA could contribute public data, calibrated sensors, modeling, data management, artificial intelligence, machine learning, public engagement, and assistance to a federal reporting system.[^12] The report also recommended reducing stigma around reporting, while keeping extraterrestrial origin as a last-resort hypothesis and stating that peer-reviewed scientific literature contained no conclusive evidence for an extraterrestrial origin of UAP.[^12]\n\n## Public Meaning and Limits\n\nNASA released the final report on September 14, 2023, and announced a director of UAP research at the same time.[^13] In NASA's release, Spergel said the team used unclassified data to preserve fact-finding, open communication, and scientific rigor, and that NASA could help future UAP work through systematic data calibration, multiple measurements, and sensor metadata.[^13] The public materials identify Spergel as chair of a temporary external study, while NASA placed ongoing coordination under a separate UAP research director.[^10][^12][^13]\n\nSpergel later described the origin and endpoint of the assignment in an Undark interview with Dan Falk.[^14] Falk reported that Thomas Zurbuchen asked Spergel during a ski trip to lead the 16-member independent team, and Spergel said NASA had done a lot for his career, so he agreed to help.[^14] In the same interview, Spergel said some events remain poorly understood but some have conventional explanations, affirmed that unexplained does not mean extraterrestrial, and wrote after the report that the team had fulfilled its charter and returned to regular research.[^14]\n\n## What His Role Establishes\n\nSpergel chaired a public UAP study, pushed the problem toward calibrated data and reproducible analysis, and helped NASA define a role alongside AARO.[^9][^10][^12][^13]\n\nNo cited public source identifies him as a witness, experiencer, whistleblower, classified-program investigator, or source for claims that UAP are non-human technology.[^9][^12][^14] Most UAP observations need better data before firm conclusions, the team did not review prior incidents, and the public scientific literature did not provide conclusive evidence of extraterrestrial origin.[^9][^12][^14]\n\n## References\n\n[^1]: [The Shaw Prize: 2010 brochure for Astronomy laureates Charles L. Bennett, Lyman A. Page Jr. and David N. Spergel](https://www.shawprize.org/wp-content/uploads/2023/08/Brochure_2010.pdf)\n[^2]: [David N. Spergel: Princeton University curriculum vitae](https://www.astro.princeton.edu/~dns/Spergel_CV.htm)\n[^3]: [Simons Foundation: David Spergel, Ph.D.](https://www.simonsfoundation.org/people/david-spergel/)\n[^4]: [MacArthur Foundation: David N. Spergel, Class of 2001](https://www.macfound.org/fellows/class-of-2001/david-n-spergel)\n[^5]: [American Academy of Arts and Sciences: David Nathaniel Spergel, last updated May 2026](https://www.amacad.org/person/david-nathaniel-spergel)\n[^6]: [Princeton Department of Astrophysical Sciences: David Spergel](https://web.astro.princeton.edu/people/david-spergel)\n[^7]: [Princeton Department of Astrophysical Sciences: Spergel receives NASA Exceptional Public Service Medal, March 7, 2022](https://web.astro.princeton.edu/news/faculty-award-spergel-receives-nasa-exceptional-public-service-medal)\n[^8]: [American Institute of Physics: Oral history interview with David Spergel, November 17-18, 2020](https://history.aip.org/history/catalog/icos/45288.html)\n[^9]: [NASA: NASA to Discuss New Unidentified Aerial Phenomena Study Today, June 9, 2022](https://www.nasa.gov/news-release/nasa-to-discuss-new-unidentified-aerial-phenomena-study-today/)\n[^10]: [NASA: NASA Announces Unidentified Aerial Phenomena Study Team Members, October 21, 2022](https://www.nasa.gov/general/nasa-announces-unidentified-aerial-phenomena-study-team-members/)\n[^11]: [NASA Science: UAP Independent Study resource page](https://science.nasa.gov/uap/)\n[^12]: [NASA: Unidentified Anomalous Phenomena Independent Study Team Final Report, September 2023](https://science.nasa.gov/wp-content/uploads/2023/09/uap-independent-study-team-final-report.pdf)\n[^13]: [NASA: NASA Shares UAP Independent Study Report; Names Director, September 14, 2023](https://www.nasa.gov/news-release/update-nasa-shares-uap-independent-study-report-names-director/)\n[^14]: [Dan Falk, Undark: Interview: NASA's New Push to Track Unexplained Objects, October 30, 2023](https://undark.org/2023/10/30/interview-nasa-unexplained-objects/)","readingTime":"7 min read"},"relatedRecords":[{"ref":{"type":"documents","slug":"2023-nasa-uap-study-report","title":"2023 NASA UAP Study Report","url":"https://disclosdex.com/documents/2023-nasa-uap-study-report"},"direction":"outbound","weight":1},{"ref":{"type":"people","slug":"federica-bianco","title":"Federica Bianco","url":"https://disclosdex.com/people/federica-bianco"},"direction":"inbound","weight":1},{"ref":{"type":"people","slug":"joshua-semeter","title":"Joshua Semeter","url":"https://disclosdex.com/people/joshua-semeter"},"direction":"inbound","weight":1},{"ref":{"type":"programs","slug":"nasa-uap-study-team","title":"NASA UAP Study Team","url":"https://disclosdex.com/programs/nasa-uap-study-team"},"direction":"outbound","weight":1},{"ref":{"type":"programs","slug":"aaro","title":"All-domain Anomaly Resolution Office (AARO)","url":"https://disclosdex.com/programs/aaro"},"direction":"outbound","weight":1},{"ref":{"type":"people","slug":"scott-kelly","title":"Scott Kelly","url":"https://disclosdex.com/people/scott-kelly"},"direction":"inbound","weight":1},{"ref":{"type":"organizations","slug":"nasa","title":"National Aeronautics and Space Administration (NASA)","url":"https://disclosdex.com/organizations/nasa"},"direction":"outbound","weight":1}],"citation":{"canonicalUrl":"https://disclosdex.com/people/david-spergel","title":"David Spergel","publisher":"Disclosdex","retrievedFrom":"https://disclosdex.com/api/v1/people/david-spergel","license":"CC-BY-4.0"}}