Sitrling Colgate

Stirling Auchincloss Colgate, a prominent American nuclear physicist, left an indelible mark on the world of science with his groundbreaking contributions and visionary insights. Born on November 14, 1925, in New York City, Colgate’s journey through academia and research was nothing short of remarkable. He attended Cornell University, where he pursued electrical engineering after being graduated from the Los Alamos Ranch School during World War II. Following a stint in the merchant marine and witnessing the aftermath of the atomic bombing of Hiroshima, Colgate returned to Cornell, earning his Bachelor of Science in 1948 and a Ph.D. in nuclear physics in 1951.

Colgate’s career took a significant turn in 1952 when he joined the Lawrence Livermore National Laboratory, spearheading diagnostic measurements for nuclear tests and later focusing on the development of the hydrogen bomb. His work was instrumental in understanding the range of energy produced by these tests and led to significant advancements in thermonuclear fusion and plasma physics. In the 1950s, he played a pivotal role in the successful detonation of the first deliverable thermonuclear bomb, the Bravo test, and subsequently delved into the physics of plasma, expanding the boundaries of our knowledge.

His fascination with astrophysics ignited during research on supernovae, where he collaborated with Montgomery H. Johnson. Together, they explored the mechanisms behind these celestial explosions and, in the process, contributed to the understanding of neutron stars. Colgate’s insatiable curiosity and groundbreaking work in this field reshaped our comprehension of the cosmos.

Beyond his scientific achievements, Colgate’s impact extended to the diplomatic sphere as well. He served as a scientific consultant on nuclear test ban negotiations in Geneva in 1959, proposing the use of spy satellites, particularly the Vela satellites, for detecting nuclear testing—an idea that remains significant to this day.

Colgate’s legacy extends far and wide, from his significant contributions to nuclear physics, plasma physics, and astrophysics, to his leadership as the president of New Mexico Tech and his role in founding the Santa Fe Institute. 

Colgate enjoyed living to the utmost. He loved hiking, flew a plane, sailed, skied and was generous and kind to everyone. He contributed to the Aspen Center for Physics as a Trustee from 1972 – 1978, General Member from 1990 – 2004, and Honorary Member from 2004 – 2013.