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description of a high altitude balloon flight reads almost interchangeably with one of the stratosphere balloon flights of the 1930s or 1950s.
    Poe was the first author since Kepler to take the scientific basis of a fictional story seriously and consequently was a major influence on a Frenchman who was a great admirer of Poe and his works and was an erstwhile author of scientific romances himself. If Edgar Allan Poe was the grandfather of realistic space fiction, Jules Verne was surely the father. Verne has had more positive influence on the development of astronautics than possibly any other author of fiction or nonfiction, at least until the early decades of this century; and even these latter authors—such as Hermann Oberth, Konstantin Tsiolkovsky, and others—owed their introduction to spaceflight to Jules Verne.
    Whenever space travel was the subject, it was assumed that it would be accomplished by some sort of mechanical device; Jules Verne’s classic From the Earth to the Moon (1865)* is a literal paean to the engineering arts and American enterprise.
    The first author to provide an unambiguous description of a rocket-propelled spacecraft was Elbert Perce. In his 1852 novel, Gulliver Joi* , he wrote of a torpedo-shaped projectile provided with a padded passenger compartment, instruments and a combustion chamber and nozzle. Only a decade later, Jules Verne became the first author to treat space travel as a problem in mathematics and engineering.
    Before the publication of From the Earth to the Moon* (1865), no one had ever applied Newton’s laws of motion to the problem of space flight—not even Newton himself. With the help of a cousin who taught math at the Sorbonne, Verne became the first to calculate the escape velocity needed to leave Earth and the trajectory needed to reach the Moon. He even appreciated the need to place the launch site as near the equator as possible. Much has been made of Verne’s use of giant cannon to launch his spacecraft—which would have been disastrous for both the projectile and its occupants—but it is clear that Verne realized the problems involved. Among the several reasons he had for choosing a cannon (not the least of which was his need to parody the American military-industrial complex, which existed even then) was the simple fact that rockets in the mid-nineteenth century were little advanced from fireworks. Nevertheless, Verne use rockets to steer his spacecraft and act as retrorockets—and was the first writer to appreciate the fact that rockets would work in a vacuum.
    However, while it seemed perfectly clear what a spaceship must be like in order to survive the ordeals of interplanetary space and, most importantly, allow its passengers to survive as well, it was far from clear what would be the most plausible method of getting the spaceship from the surface of the Earth and into space. In fact, while there were numerous proposals for reaction-powered aircraft during the nineteenth century, there were less than half a dozen suggestions made that rockets might be useful in space travel. Most writers realized, as Verne did, that the state of the art of rocketry was utterly inadequate for the task.
    By and large, the propulsive method of choice for the last century (and, for that matter, well into this one) was antigravity, which was, in reality, only the magic and occultism of previous centuries given a pseudoscientific guise. The important difference is that it was felt necessary to put on that guise. And no matter what the method of propulsion ultimately chosen, writers still had to deal with the known reality of conditions beyond the Earth’s atmosphere and on other planets. The airlessness of the interplanetary void, its extremes of cold and heat, the danger of meteorites, the problem of providing food and oxygen . . . all had to be dealt with believably, especially since the facts of astronomy were quite well known to the science-knowledgeable nineteenth century