NASA Programs in the 1970s: The History and Legacy of the Space Agency’s Missions to Mars and Beyond

Space exploration was always an expensive business, and throughout NASA’s history, the agency has had to justify to Congress its need for every dollar it intended to spend. This problem has helped NASA to be more careful and more creative with the money they did receive, and scientists had to justify the equipment they wanted to include on each space probe. They had to justify the size and the power demand, too. If they wanted too much, the entire mission might be scrubbed, and all their work would have been for naught. This made planning and designs leaner and more efficient, as scientists and engineers were more careful with their recommendations.

In fact, the Pioneer program was the most diversified sequence of any of NASA’s programs, and though they’re now remembered for being among the first probes in history to reach the Outer Solar System, the elaborate planning changed goals several times over several years before resulting in historic successes. NASA had wanted to do a Grand Tour of the Solar System toward the end of the 1970s to take advantage of the scheduled alignment of planets, which meant the Pioneer missions were meant to be test runs prior to the main events (Voyager 1 and Voyager 2), and a great many things discovered by Pioneer 10 and Pioneer 11 were essential to the successful planning of the Voyager probes.

Voyager 1 and 2 have done far more than accomplish their original missions. In fact, they are now exploring interstellar space, far beyond the outer planets in the cold wasteland between the stars. Each spacecraft carries a copy of a golden record which contains an introduction to Earth, should some alien civilization happen to encounter either Voyager 1 or Voyager 2. In the first Star Trek movie, writers imagined just that, creating a story of a Voyager spacecraft being captured and adapted for its own uses.

In 1960, when Eisenhower’s administration began planning and funding for the famous Apollo program that would land the first men on the Moon in 1969, the Soviet Union was already thinking further ahead, literally. In one of the worst kept secrets of the Space Race, the Soviet Union launched two probes, Korabl 4 and Korabl 5, toward Mars in October 1960. When the Soviet Union attempted to launch probes to Mars in 1960, the goals were considerably less ambitious than saying hello to little green men. Those first two probes were intended merely to fly by Mars and transmit photos of the planet. In addition to getting closer looks at the Red Planet than ever before, the true value of those 1960 missions was the propaganda victory the Soviets hoped to score, obtaining yet another notch in their Space Race belt. Though the Soviets’ missions failed that year, they were still years ahead of the United States.

In November 1971, NASA’s Mariner 9 became the first spacecraft to enter Mars’ orbit, but the Soviets’ Mars 2 and Mars 3 spacecrafts were hot on its heels. Mariner 9 was designed to orbit around Mars, but the Soviets’ spacecrafts had descent modules designed to actually land on the Red Planet’s surface. The descent module aboard Mars 2 crash landed on Mars’ surface on November 27, but less than a week later, Mars 3’s descent module began its historic descent down to the surface. On December 2, 1971, after a few hours of descending, it successfully completed its “soft landing.”

Both Viking landers were huge successes just for landing on Mars and transmitting data, but they would end up exceeding NASA’s wildest expectations. NASA hoped the Viking missions would provide better images of Mars’ surface and the ability to determine the chemistry and biology of the soil, which might indicate signs of life. The Viking missions ended up providing an extremely comprehensive overview of the Martian surface and atmosphere.