16 moments
Birth in Bensonhurst
· Bensonhurst, Brooklyn, New York City, New York, United States
Carl Edward Sagan was born in the Bensonhurst neighborhood of Brooklyn, New York City. Neighborhood-level coordinate.
1939 New York World's Fair visit
· 1939 New York World's Fair, Flushing Meadows, Queens, New York City, New York, United States
As a child, Sagan visited the 1939 New York World's Fair with his parents, an experience he later described as formative. The source supports the year but not a more precise visit date.
Move to Rahway and high-school attendance
· Rahway High School, Rahway, New Jersey, United States

Wikimedia Commons · Public domain · file Sagan moved with his family to Rahway, New Jersey, and attended Rahway High School.
University of Chicago student
· University of Chicago, Hyde Park, Chicago, Illinois, United States

Wikimedia Commons · Public domain · file After graduating from Rahway High School, Sagan attended the University of Chicago, where he completed undergraduate and graduate study through 1960. The source establishes attendance following his 1951 graduation; it does not give an enrollment day or month.
Miller Fellowship at UC Berkeley
· University of California, Berkeley, Berkeley, California, United States
Sagan held a Miller Fellowship at the University of California, Berkeley, during the beginning of his professional scientific career. The source supports a 1960–1962 presence; the card date records the beginning year.
Harvard and Smithsonian appointment
· Harvard University, Cambridge, Massachusetts, United States
Sagan lectured, researched, and advised graduate students at Harvard while also working at the Smithsonian Astrophysical Observatory in Cambridge. The source supports a 1963–1968 presence in Cambridge; the coordinate marks Harvard's main campus.
Move to Cornell
· Cornell University, Ithaca, New York, United States

Wikimedia Commons · Creative Commons Attribution-Share Alike 4.0 International · file After Harvard denied him tenure, Sagan accepted Cornell University's offer and began the long Ithaca-based phase of his career. The source gives the transition year but not a precise arrival date.
House UFO symposium testimony
· Washington, D.C., United States
Sagan testified at a House Committee on Science and Astronautics symposium on unidentified flying objects, arguing against an expensive broad investigation without stronger evidence. Washington, D.C. is used as the defensible location for the House committee symposium; the source does not identify a specific hearing room.
Royal Institution Christmas Lectures
· Royal Institution, London, England, United Kingdom
Sagan delivered six Royal Institution Christmas Lectures, titled "The Planets," bringing planetary science to a broad public audience in London. The Royal Institution's archive identifies the 1977 lecture series but does not provide individual lecture dates.
Gifford Lectures at the University of Glasgow
· University of Glasgow, Glasgow, Scotland, United Kingdom
Sagan delivered the University of Glasgow Gifford Lectures under the theme "The Search For Who We Are."
Senate greenhouse-effect testimony
· United States Capitol, Washington, D.C., United States
Sagan testified before Congress on the greenhouse effect, an early high-profile intervention on climate change and its risks. The Capitol coordinate represents the congressional hearing location; the cited program title establishes the testimony date but not a specific hearing room.
Nevada Test Site protest arrest
· Nevada Test Site, Nevada, United States
Sagan was arrested with other anti-nuclear protesters after crossing the boundary at the Nevada Test Site during a weapons-test protest. The coordinate is a representative point for the Nevada Test Site; the report does not specify the precise gate location.
Nevada Test Site protest arrest
· Nevada Test Site, Nevada, United States
Sagan was again arrested during a major anti-nuclear demonstration at the Nevada Test Site. The coordinate is a representative point for the Nevada Test Site.
Meeting with CDC employees
· CDC Roybal Campus, Atlanta, Georgia, United States

Wikimedia Commons · Public domain · file Sagan met with Centers for Disease Control employees at the Roybal Campus in Atlanta. The CDC image metadata supplies the year but not a more precise date.
Independence Day remarks at Monticello
· Monticello, Charlottesville, Virginia, United States

Wikimedia Commons · All rights reserved Sagan delivered remarks at Monticello's Independence Day ceremony, linking Jefferson, democracy, and scientific values.
Death at Fred Hutchinson Cancer Research Center
· Fred Hutchinson Cancer Research Center, Seattle, Washington, United States
After suffering from myelodysplasia and receiving bone-marrow transplants, Sagan died of pneumonia in Seattle.