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Born to Explore

John Casani’s Grand Tour of the Solar System

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Pub Date Dec 01 2025 | Archive Date Nov 30 2025


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Description

Once, there were giants in the heavens: billion-dollar machines of wonder and science that flew to the outermost planets and told us what secrets had been lying in wait. In charge of the people and processes behind these missions was a humble father of five who did the job not for money or prestige but simply because it represented a challenge like no other. That man was John Casani. The full story of his unparalleled life and career is told here for the first time.

Young Casani was obsessed with the mechanical world yet lacked direction in life. After restarting college for an engineering degree, he then whimsically road-tripped to California in the late 1950s and was hired, almost by accident, at Pasadena’s secretive Jet Propulsion Laboratory.

Beginning as a workaday technician, Casani rose through JPL’s ranks to senior management—while battling politics, funding, physics, and occasionally colleagues. With inborn skill and uncommon methods he kept his troops focused on success. Casani ran nine-figure space missions off the index cards in his shirt pocket, once employed a live goat to press people into action, and even sent messages to aliens in space.

Born to Explore examines a transitional period of space history, when planetary exploration faced threats from an adversarial space shuttle program that consumed the lion’s share of NASA funding. Recounted by Jay Gallentine, Casani’s life story unfolds in conjunction with the tribulations of the Galileo mission to Jupiter—a twisting case study of what can go wrong even with the best intentions and the best minds in the world at work.
 

Once, there were giants in the heavens: billion-dollar machines of wonder and science that flew to the outermost planets and told us what secrets had been lying in wait. In charge of the people and...


Advance Praise

“A journey into the life of a man who made the impossible possible. Tasked with exploring the depths of the solar system with little precedent or guidance, NASA’s John Casani faced overwhelming technical, financial, and scientific challenges—yet his relentless drive led to some of the most historic missions ever undertaken. We’re where we are today because Casani worked in a ‘room without corners,’ and I hope readers will come to appreciate him in the same way I now do.”—Beth Mund, executive director of Stories of Space and host of the podcast Casual Space

“It was a joy discovering this book. It’s an incredible read. . . . I loved learning the pieces of the story I didn’t know.”—David Hitt, coauthor of Bold They Rise: The Space Shuttle Early Years, 1972–1986

“There’s an excellent chance that John Casani is your favorite engineer’s favorite engineer, and the delightfully engaging Born to Explore makes clear why he merits so much adulation: Without his genius for solving the American space program’s thorniest problems, we’d know far less about our fascinating little corner of the Milky Way. Jay Gallentine does a brilliant job of exploring how Casani’s innate curiosity and agile mind drove him.”—Brendan I. Koerner, contributing editor at Wired and author of The Skies Belong to Us

“Entrust yourself to the guiding hand of Jay Gallentine, who with Born to Explore charts another parabolic trajectory into the dark reaches of space, investigating the all-too-earthly reasoning behind the daring and dubious decisions to orbit celestial bodies and plumb galactic realms beyond.”—Don Wildman, host of Travel Channel’s Mysteries at the Museum and host of the podcast American History Hit

“A journey into the life of a man who made the impossible possible. Tasked with exploring the depths of the solar system with little precedent or guidance, NASA’s John Casani faced overwhelming...


Available Editions

EDITION Other Format
ISBN 9781496206657
PRICE $39.95 (USD)
PAGES 400

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Featured Reviews

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I must admit, I have never read any of Jay Gallentine’s earlier books. Yet, his book, "Born to Explore: John Casani’s Grand Tour of the Solar System" is a genuinely engaging narrative, a human-interest story of John Casani, an engineer who rose through the ranks and later became one of the key players in planetary exploration at the Jet Propulsion Laboratory (JPL).
Gallentine's writing is understandable and rich with detail, making this a fantastic read for anyone who loves the human stories behind the space race. He takes us through Casani's journey, from his accidental start in engineering to the golden age of exploration at the JPL, weaving together all the technical challenges, organizational drama, and personal sacrifices that came with pioneering this work. The narrative contains anecdotes, humor, and candid reflections from Casani and his colleagues, giving one an insider’s look at the triumphs and setbacks behind iconic missions like Voyager, Galileo, and Cassini.
What I really loved is that the focus is on the people: their eccentricities, camaraderie, and relentless, inspiring drive to solve problems that had no precedence and have never been solved before.
The author avoids heavy technical jargon; instead, he made those complex engineering and scientific concepts understandable for a general audience. The book reads more like a compelling, sometimes serious and at times humorous, story than a dry technical manual exploring the broader context of NASA's love-and-hate relationship with budget and science committees and its evolving culture, with a mixture of biographical, organizational history, and engineering case studies.
One thing that I can suggest, though, is that the author should consider including an image of John Casani’s face on the cover page of the book since the story revolves around him.
In its entirety, Born to Explore is a powerful celebration of discovery, resilience, and the true spirit of exploration. It is a story of persistence in the face of adversity; and, having finished the book, the reader will walk away with a huge appreciation for the unsung heroes who made all of those stunning space missions possible.

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