To the nautical imagery that has helped symbolize the Space Age—rocket ship, space port, Mariner, Magellan, “this new ocean”—add “becalmed,” the word that best describes the U.S. space program’s stagnation.
The blueprint for the Space Age unfolded in October 1951 at the Hayden Planetarium in New York. There, Wernher von Braun presided over the First Annual Symposium on Space Travel, and the small galaxy of visionaries in attendance laid out the plan against which all subsequent plans have been measured. Its heart was the “conquest” of space by men who were to fly shuttles on a series of missions to build a doughnut-shaped station rotating in permanent Earth orbit. Most importantly, the station would itself be an embarkation point for an expedition to start a colony on Mars. The phenomenally ambitious program was depicted in eight installments in Collier’s magazine from 1952 to 1954 (at 15 cents an issue).
In this plan and in later embellishments by thinkers like Arthur C. Clarke, Isaac Asimov, Gerard K. O’Neill, and Carl Sagan, moving into space was seen as an expression of manifest destiny. But it was subverted by President John F. Kennedy’s decision in 1961 to send astronauts to the moon. Apollo was the greatest feat of human exploration in history, an unparalleled technological and managerial tour de force, and a sensational propaganda triumph. But it derailed the grand scheme. Its impact was so great that it forever defined the U.S. space program, transforming it into a series of imitative, relatively short-term goals devoid of overarching purpose.
The space program started to go out of focus on December 14, 1972, when Gene Cernan, the last man on the moon, packed up and went home. It has drifted since then—with the few notable exceptions of robotic planetary exploration, such as Voyager’s epic grand tour, and the triumphs of the Hubble Space Telescope.
The perfect example of how not to do a space program is the International Space Station. Its tortured history epitomizes the quagmire we are now in. President Bush has unilaterally reduced the station’s structure and crew size, infuriating the European Space Agency and sending a message about the thing’s very low priority to an equally indifferent public.
If the U.S. space program is to recapture public enthusiasm and restore unwavering government support, it needs a truly compelling goal. And there is one: planetary defense.
Earth’s treasure can be safeguarded by creating a safe place for life and civilization’s collective record off the planet. That single, overwhelmingly important goal can be achieved only through reusable spacecraft that enable continuous access to space.
The array of threats to Earth, both natural and man-made, is formidable: thermonuclear war; any of several kinds of apocalyptic terrorism, notably nuclear, chemical, or biological; the mutation of a virus—an airborne HIV, for example; a major accident or series of them involving nuclear weapons or nuclear power plants; global warming. Even a limited nuclear war would result in terrible atmospheric and other environmental contamination and planet-wide social and economic upheaval.
And then there are the asteroids. Scientists now believe that at least one asteroid has caused global damage to Earth. Earlier this year, three cosmic visitors suddenly appeared relatively close to home. The first, which was the size of a large shopping mall, passed by in January at a distance of roughly 500,000 miles, which is relatively close in astronomical terms. Two months later, a second, measuring some 200 feet, came within 300,000 miles. And in mid-June a “city-busting” rock the size of the proverbial football field came within 75,000 miles of this planet. It is estimated that several asteroids pass within moon distance of Earth every year. Astronomers like David Morrison at NASA’s Ames Research Center in California and Donald K. Yeomans, who heads NASA’s Near-Earth Object Program Office at the Jet Propulsion Laboratory in Pasadena, California, specialize in cataloging and analyzing potentially hazardous visitors. They and others emphasize repeatedly that there is no foreseeable danger of a collision with an asteroid. But Yeomans, a prudent individual, called the successive passes this year “a wake-up call” for increased scrutiny.
There is of course no cause for panic. Earth is a very seaworthy spacecraft sailing through the cosmic void. But however seaworthy a vessel is, no responsible skipper would go to sea without insurance and a lifeboat. The space program should build the lifeboat.