Life on other planets

Interview with Lev Gindilis, Russian astronomer and a pioneer of modern SETI research. Leonid Gurvits translated this interview in real-time. Gindilis discusses his studies in optical astronomy at Moscow State University. He describes how the work of his friend Nikolai Kardashev inspired him to switch his area of focus and join the radio astronomy department. Gindilis recounts helping to build the RATAN 600 telescope, as well as his work organizing meetings on SETI topics, including the First Soviet-American Conference on Communication with Extraterrestrial Intelligence in 1971. Gindilis reflects on the philosophical aspects of extraterrestrial communication, such as the question of mutual understanding. He discusses Kardashev’s investigations into CTA-21 and CTA-102 and the importance of the discovery of variability. The interview concludes with Gindilis’ reflections on international collaboration in SETI research and the effects of the Cold War.

Interview with Kenneth Kellermann, American astronomer at the National Radio Astronomy Observatory. The interview focuses on Kellermann’s role in the early development of very long baseline interferometry (VLBI), beginning in the 1960s. Kellermann goes into detail about the collaborations on VLBI between the American, Australian, and Swedish scientific communities. He also describes the informal exchanges he took part in with Russian scientists. Kellermann discusses the network of scientists from both the US and USSR that worked together on VLBI, and he speaks on his relationship with Iosif Shklovsky. The interview then shifts to Kellermann’s work on the search for extraterrestrial intelligence, beginning with his time in Australia. He talks about various SETI conferences, particularly the First Soviet-American Conference on Communication with Extraterrestrial Intelligence in 1971 in Byurakan. The interview concludes with Kellermann sharing his current thoughts on SETI and how the work has changed over time.

Interview with James Kasting, geoscientist and Distinguished Professor of Geosciences at Penn State University. Kasting describes a childhood spent in many places due to his father’s job at General Electric. For a time, he lived in Huntsville, Alabama near the NASA Marshall Space Flight Center, which piqued his interest in science and space. Kasting discusses his undergraduate studies at Harvard University, where he gravitated toward theory over experimentation while studying chemistry and physics. His developing interest in astronomy and space science led Kasting to graduate school first at UC San Diego, then University of Michigan. He recalls his postdoc at the National Center for Atmospheric Research and then his position at NASA’s Ames Research Center working with Jim Pollack. Kasting discusses his return to academia at Penn State, as well as the committees and panels he has served on over the years, such as the Terrestrial Planet Finder Science working group. Throughout the interview, Kasting talks about many areas of his research such as habitable zones, climate models, atmosphere studies, and extrasolar planets. The interview concludes with Kasting’s thoughts on extraterrestrial intelligent life and sending manned missions to Mars.

Interview with Abel Méndez, professor of physics and astrobiology at the University of Puerto Rico at Arecibo. In this interview, Professor Méndez discusses his upbringing in Puerto Rico and early interest in astronomy, his education at the University of Puerto Rico and work at Fermilab, and the early stages of his work on astrobiology with NASA. He describes the origins of the Planetary Habitability Lab at Arecibo and his work studying exoplanets for potential suitability for life. Finally, he discusses the work environment at Arecibo, the impact of Hurricane Maria on Puerto Rico, the collapse of the telescope’s dish, and the potential future of the Observatory.

In this interview, Steven Squyres discusses: taking Chief Scientist position at Blue Origin; current interests in planetary science including the shift toward sample return missions; changes to human and robotic spaceflight; private enterprise’s emerging role; family background; decision to attend Cornell undergrad in geology; how a course on the results of the Viking mission influenced his decision to pursue robotic exploration of the solar system; involvement in underwater exploration; PhD at Cornell under Carl Sagan and Joe Veverka for the Voyager project; details of the Voyager mission; dissertation work on the geology and geophysics of Ganymede and Callisto with Gene Shoemaker; postdoc and later job with Pat Cassen and Ray Reynolds at NASA Ames; working on Mars with Michael Carr; reaction to the Challenger tragedy; decision to take position at Cornell and to study the Martian surface; 10 years of proposals to NASA, including one that led to Spirit and Opportunity; Martian habitablity; question of how life arises from non-living material; details of his approach to the Martian geological exploration project; discussion of Spirit and Opportunity’s “honorable” demises; experience as rover’s Primary Investigator (PI) and his internal management strategies; communicating information to the press; reflections on the nature of science; conclusions from Spirit and Opportunity missions; involvement with the Magellan mission; work on the Cassini imaging system; chairing NASA’s planetary decadal survey 2013-2023, recommending Europa Clipper and Perseverance; chairing the NASA Advisory Council; writing Roving Mars; stories of innovative problem-solving from the rover missions; meteorite science; reflections on his time as faculty at Cornell; transition to Blue Origin; and his long-term view of potential space occupation and habitation. Toward the end of the interview, Squyres reflects on the question of whether other lifeforms exist and on the importance of experimentation to answer that question.

Early life in Sydney; interest in astronomy (Halley’s Comet, 1910); American astronomers; war years and science in New Zealand Navy; employment in Cook Islands, 1945-1959; manager of a trading concern; contract with Brad Wood, University of Pennsylvania; lecture tour to Canada and the United States (Harlow Shapley, Charles D. Shane), 1957; state of astronomy in New Zealand in the 1920s and now; establishment of Black Birch Observatory in New Zealand; interest in cooperative ventures with the United States; the Mt. John years, funding efforts; 1965 total solar eclipse in Cook Islands; comments on retirement, publications, UFO?s and extraterrestrial life; role in Royal Astronomical Society of New Zealand.