Lucky Starr and the Moons of Jupiter

Lore & Background

The novel takes place in the Jovian system. In the mid-1950s, when the novel was written, Jupiter had twelve known satellites. The first half of the novel takes place on what was then the outermost known satellite, Jupiter IX, discovered by Seth Barnes Nicholson in 1914. Jupiter IX had been given the unofficial name 'Hades' in 1955, but in the novel Asimov mistakenly refers to it as Adrastea, which was the unofficial name of Jupiter XII. The confusion arose from the fact that Jupiter IX was the twelfth farthest known satellite, while Jupiter XII was the ninth farthest known satellite. In 1975, the International Astronomical Union gave Jupiter IX the official name Sinope. Asimov describes Jupiter IX as being 89 miles in diameter, but its diameter is now thought to be only 23 miles. Part of the novel is also set on Io, the innermost of the Galilean moons. Io is depicted as having a thin atmosphere of methane, and fields of ammonia snow and ice, as well as rivers of liquid ammonia.

Reader's Guide

The novel is significant as the only Asimov work set in the Jovian system and as a key entry in the Lucky Starr series, which transformed from the 'masked crimefighter' subgenre to the espionage subgenre with the introduction of the Sirians. The Three Laws of Robotics plays a part in the novel, revealing Asimov as the true author, though for the sake of continuity the novel was published under the pseudonym 'Paul French'. The novel contains small inconsistencies with other books in the series, such as the name of the first man on Mars and the name of the ruling state. Reception was favorable, with Galaxy's Floyd C. Gale calling it the best of the Lucky Starr series and The New York Times declaring it 'well-written adventure'.

Did You Know?

• The novel mistakenly refers to Jupiter IX as Adrastea, which was the unofficial name of Jupiter XII.
• Jupiter IX was later officially named Sinope by the International Astronomical Union in 1975.
• Asimov described Jupiter IX as 89 miles in diameter, but its actual diameter is now thought to be only 23 miles.
• The robot spy in the novel is a German Shepherd named Mutt.

From Petrovichi to Brooklyn: A Childhood Forged by Survival

Asimov entered the world in the small Russian town of Petrovichi, his exact birth date lost to history somewhere between late October 1919 and early January 1920. His parents, Anna Rachel Berman and Judah Asimov, were Russian Jews who raised him in a household where faith was present but never rigidly enforced. The family endured a harrowing winter in 1921 when a double pneumonia outbreak claimed the lives of sixteen other children in the community; young Isaac was the sole survivor. Two younger siblings—a sister and a brother who would later rise to vice-president of Newsday—completed the family. In early 1923, the family boarded the RMS Baltic in Liverpool and crossed the Atlantic, stepping onto American soil in February. Growing up in Brooklyn, Asimov taught himself to read by age five, a skill his mother leveraged to place him a year ahead in school. The family's candy stores, which also stocked newspapers and pulp magazines, became his first great library, and by nine he was devouring science fiction. He became a naturalized American citizen at just eight years old.

Architect of a Unified Future

During his lifetime, Asimov stood alongside Robert A. Heinlein and Arthur C. Clarke as one of the "Big Three" of science fiction, a distinction that reflected both his sheer volume and his intellectual rigor. He authored or edited more than five hundred books and an estimated ninety thousand letters and postcards, with his output spanning nine of the ten Dewey decimal categories. His most celebrated achievement, the Foundation series depicting the collapse of a vast interstellar empire, earned the one-time Hugo Award for Best All-Time Series in 1966. The Galactic Empire novels, set in the deeper past of the same fictional cosmos, and the Robot series—featuring landmark novels like The Caves of Steel and The Naked Sun from the mid-1950s—formed the other great pillars. In 1986, with Foundation and Earth, he wove these separate threads into a single, continuous future history. Beyond novels, he penned over three hundred and eighty short stories, including "Nightfall," which the Science Fiction Writers of America voted the finest short science fiction story ever written in 1964. For younger readers, he crafted the Lucky Starr juvenile series under the pen name Paul French.

Science as Story: The Popular Science Voice

Beyond his fiction, Asimov held a professorship in biochemistry at Boston University and devoted enormous energy to making complex scientific ideas accessible to general audiences. His popular science books share a distinctive methodological approach: rather than launching into modern complexity, he traced each discipline backward to its simplest historical origins, building understanding layer by layer. Works such as Guide to Science, the three-volume Understanding Physics, and Asimov's Chronology of Science and Discovery exemplify this narrative strategy. His non-fiction reach extended far beyond the physical sciences—he wrote on chemistry, astronomy, mathematics, and history, and even produced guides to the Bible and to Shakespeare, demonstrating a genuine curiosity that refused to respect disciplinary boundaries. This breadth was rooted in his own educational path: after graduating from Boys High School at fifteen, he briefly attended City College of New York before earning a scholarship to Seth Low Junior College, a Columbia University branch in Brooklyn specifically created to admit academically qualified Jewish and Italian-American students turned away by unwritten ethnic quotas at Columbia College. He initially studied zoology but switched to chemistry after his first semester, completing his degree at Columbia after Seth Low closed in 1936.

A Name That Became a Legacy

The surname Asimov carries a story of its own. It derives from azimy khleb, meaning winter rye bread, a trade in which his great-great-great-grandfather dealt. When the family emigrated and the name had to be rendered in Latin script, his father chose the letter S, believing it sounded like the Z in the original Russian spelling. Asimov later turned this small etymological quirk into the short story "Spell My Name with an S." He firmly rejected early suggestions to adopt a more conventional pseudonym, convinced that the unusual name itself was an asset; years later, many readers still assumed "Isaac Asimov" was a pen name invented by someone with a common surname. His posthumous legacy is equally expansive. The asteroid (5020) Asimov orbits the sun, a crater on Mars bears his name, a Brooklyn elementary school carries it, and Honda named its humanoid robot ASIMO in his honor. Four literary awards have been established under his name, and he served as president of the American Humanist Association. He died on April 6, 1992, leaving behind a body of work that continues to shape how millions understand both science and storytelling.