The leak consisted of Sagan revealing the titles of two classified papers from the A119 project—the 1958 paper "Possible Contribution of Lunar Nuclear Weapons Detonations to the Solution of Some Problems in Planetary Astronomy", and the 1959 paper "Radiological Contamination of the Moon by Nuclear Weapons Detonations".
Саган раскрыл названия двух секретных документов по проекту A119: документа 1958 года "Possible Contribution of Lunar Nuclear Weapons Detonations to the Solution of Some Problems in Planetary Astronomy", и документа 1959 года "Radiological Contamination of the Moon by Nuclear Weapons Detonations"', что было утечкой информации.