Astronomical photography

Interviewed by
Henrik Hargitai
Interview date
Abstract

Interview with Ken Herkenhoff, a research geologist at the U. S. Geological Survey’s Astrogeology Science Center. Herkenhoff begins by sharing how he first became interested in Mars polar research while a student at Caltech. He recalls studying images from Mariner 9 with Larry Soderblom and explains his focus on layer deposits in polar ice. Herkenhoff reflects on the changes in technology which have influenced his work and discusses the different image qualities across Viking and Mariner missions over the years. He explains the process of creating maps and discusses the transition from hand-drawn maps to GIS maps. Herkenhoff recalls his move from the Jet Propulsion Lab to USGS and discusses his current work using images from the Curiosity rover. The interview concludes with Herkenhoff sharing the differences between mapping different regions, and he encourages young people to pursue planetary mapping. 

Interviewed by
Alan Lightman
Interview date
Location
Austin, Texas
Abstract

Interview discusses Gerard de Vaucouleur's childhood in Paris and family background; early reading; membership in the French Astronomical Society; early work on astronomical catalogues; work at the Paris planetarium in 1937; undergraduate work at the University of Paris; education at the Sorbonne; introduction to Julien Peridier; early work in astronomical photography; discussion of French astronomy in the 1930s; early attitude toward the big bang model; work at the Sorbonne; move to the new Institute of Astrophysics in 1945; work on the r1/4 law for the brightness distribution in galaxies; work on the supercluster of galaxies in the 1950s; influence of Vera Rubin's work; community's reception of de Vaucouleurs's work on the supercluster and his challenge of the assumption of large-scale homogeneity; interaction with Fritz Zwicky; attitude toward the Center for Astrophysics (CfA)  redshift surveys by de Lapparent, Margaret Geller, and John Huchra; a hierarchical model for the universe; discussion of the meaning of homogeneity; attitudes toward the horizon problem, the inflationary universe model, dark matter, the flatness problem, work on the very early universe, and the big bang model; relationship of theory and observation; the ideal design of the universe; the question of whether the universe has a point.

Interviewed by
David DeVorkin
Interview date
Location
Naval Research Laboratory
Abstract

George Carruthers was born 1939 in Cincinnati, Ohio; child of George Arthur Carruthers and Sophia Singley Carruthers; father an engineer at Wright-Patterson Air Force Base; interest in science from reading science fiction; built his own telescope while in junior high school; very little discrimination in elementary or junior high school even though he was one of few African Americans; moved to Chicago for high school; access to Adler Planetarium and built more telescopes; read about rocket launches and Herb Frieman; read The Viking Rocket Story by Milton Rosen; undergraduate University of Illinois 1957-61; Ph.D. University of Illinois 1964; "An Experimental Investigation on Atomic Nitrogen Recombination;" while in graduate school spent a summer at AerJet in California; exposure to engineers and "big science;" post-doctorate at E. O. Hurlburt Center for Space Research at Naval Research Laboratory (NRL), in unit headed by Talbot Chubb; dichotomy between scientists and engineers; little discrimination; small science vs. big science; molecular hydrogen; concern with science education and Project SMART; cameras and sensors on rockets; spectrography; electronographic technology; joint proposal with Thorton Page; hired permanently at NRL; charge-coupled device (CCD) technology; Apollo 16; geocorona camera.