The Time America Seriously Considered Nuking the Moon

In 1958, the United States Air Force assembled a team of ten scientists in Chicago and asked them to work out what would happen if America detonated a nuclear bomb on the surface of the moon. The plan was called Project A119, though its official title was far more polite: "A Study of Lunar Research Flights." The objective was not science. It was a spectacle. The Americans wanted the explosion to be visible from Earth so that every person on the planet, and particularly every person in the Kremlin, would look up at the night sky and understand who was in charge.Also Read: How Irena Sendler Smuggled 2,500 Jewish Children Right Under the Nazis' NosesThe project was real. It was classified. And one of the scientists on the team was a twenty-four-year-old

graduate student named Carl Sagan, decades before he would become the most beloved science communicator in history.

Sputnik Changed Everything

To understand why serious men sat down to discuss bombing the moon, you need to go back to 4 October 1957. That was the day the Soviet Union launched Sputnik, the first artificial satellite to orbit Earth. Two months later, a second Soviet satellite carried a dog named Laika into orbit. Meanwhile, America's Vanguard rocket exploded on the launch pad in front of the world's cameras.

The United States was losing the space race before it had begun. Newspapers reported rumours that the Soviets planned to detonate a hydrogen bomb on the moon. Whether or not the rumour was true, it pushed the Air Force to act. In May 1958, the Armour Research Foundation at the Illinois Institute of Technology was quietly tasked with studying a lunar nuclear detonation.

The Team

The project was led by Leonard Reiffel, a physicist who would later become deputy director of NASA's Apollo programme. His team included astronomer Gerard Kuiper and Kuiper's doctoral student, Carl Sagan. Sagan's job was modelling how a dust cloud from a nuclear explosion would expand in the near-vacuum of the lunar surface. The Air Force needed to know if the flash would be visible from Earth.The plan called for an intercontinental ballistic missile to carry an atomic bomb to the moon. The detonation would take place on the terminator line, the boundary between the lit and dark sides, where the flash would be most visible.Reiffel was uneasy from the start. "I made it clear at the time there would be a huge cost to science of destroying a pristine lunar environment," he told The Observer in 2000. "But the US Air Force was mainly concerned about how the nuclear explosion would play on Earth." The Air Force, he added, considered the moon to be "military high ground."

Why It Never Happened

By early 1959, the Air Force quietly cancelled the project. The risks were enormous. A failed launch could send a nuclear warhead crashing back to Earth. The Soviets had their own identical plan, codenamed Project E-4, which they also abandoned for the same reason: the terrifying possibility of the missile falling back on their own territory. Both superpowers came to the same conclusion independently. A moon landing would be a far better propaganda victory than a moon bombing.

The project remained classified for over forty years. It surfaced only because of Carl Sagan's own carelessness. In 1959, the young scientist applied for a fellowship at Berkeley and listed two classified paper titles from the project on his application. Biographer Keay Davidson discovered this while researching Carl Sagan: A Life, published in 1999. A review in Nature flagged the revelation. Reiffel broke his silence, confirming the project's existence and calling it something he had hoped would stay buried."It is obscene," British nuclear historian David Lowry said when the story became public. "To think that the first contact human beings would have had with another world would have been to explode a nuclear bomb."Also Read: Meet Velu Nachiyar: India's First Queen to Fight the British, Forty Years Before the 1857 Revolt

The Moon We Almost Lost

In 1967, the Outer Space Treaty banned nuclear weapons in space. Project A119 is the kind of story that sounds too absurd to be true. But it is true. And its strangest detail may be this: the man who calculated how the dust cloud would look would spend the rest of his life arguing for the protection of every world we could reach. Carl Sagan became the voice of wonder, humility, and cosmic responsibility. But before all of that, he was a twenty-four-year-old doing the maths on how to nuke the moon. History is not always the story of our best instincts. Sometimes it is the story of the ones we were wise enough to abandon.