9. Gemini revealed a two-part spacecraft with only the capsule returning to earth
The Gemini orbiting vehicle was a two-part spacecraft which consisted of an adapter module and a re-entry module. The re-entry module was the capsule, considerably larger than Mercury, and in an improvement over Mercury used all solid-state electronics, modularized for ease of replacement. The booster system consisted of rocket engines which used fuel that spontaneously combusted when combined with an oxidizer, providing a more stable lift vehicle, and a less dangerous one for the astronauts. Because the risk of rocket explosion was lower and the size of such an explosion was smaller, Gemini was equipped with ejection seats, rather than an abort rocket to pull the capsule away from the booster.
To the general public, Gemini’s ten missions were a rousing success, including America’s first spacewalk and television transmissions from space, but underneath the glamor presented by NASA there were problems, several of which could have resulted in fatal accidents had the crews and ground support not have come up with innovative ways of dealing with them. Gemini had only two test flights of unmanned spacecraft before beginning manned flights in 1965, using the Titan II rocket for the booster on all of them. The Titan II was the primary rocket used by the US Air Force for its ICBM program at the time, and it took considerable testing and modification before it was approved for use in manned flights.
10. Gemini III introduced the corned beef sandwich to spaceflight
When Gus Grissom was recovered from the second manned American spaceflight his Mercury capsule was lost to the sea (it was recovered decades later). Because of the incident Grissom named the first manned Gemini mission’s spacecraft Molly Brown, after the survivor of the Titanic sinking. It was the only officially named capsule of the Gemini program, all of the other missions were identified by their mission number. Grissom and his co-pilot, John Young, also violated NASA rules when it was revealed that Young had smuggled a corned beef sandwich aboard, in a pocket of his spacesuit, which both astronauts sampled during the three orbit flight before realizing that the crumbs released into the atmosphere were potentially dangerous to equipment.
The flight was not without problems, which were observed by the astronauts and reported to Mission Control. An inflight experiment failed because of a damaged piece of equipment involved in it and the capsule developed a continuous drift to the left due to equipment venting. While the capsule was descending following re-entry it shifted abruptly under the parachutes, causing Grissom to strike his helmet faceplate on a control panel with enough force to crack it, which led to a change of material for all future helmets. The crew overshot their landing area by more than 80 miles and Grissom, understandably given his earlier experience, left the hatch closed until approached by Navy divers.
11. Gemini IV included the first repair on a spacecraft in flight by its occupants
Gemini IV featured America’s first attempt to rendezvous with another body in space, which failed, and America’s first extravehicular activity (EVA) when astronaut Ed White remained outside of the orbiting spacecraft, on a tether, for about twenty minutes. The spacewalk, as it became known, was considered with awe by the public when pictures of White floating in space were released. The spacewalk was the most notable success of the mission, and it nearly led to its most devastating failure, one which if not corrected would have led to the deaths of both astronauts, either in orbit or upon re-entry. The problem was not reported in the press at the time, overwhelmed by the story of the spacewalk.
When White exited the spacecraft to begin his EVA, he encountered a problem with the latch on the hatch, which failed to release. White had seen a similar problem during training and had observed the technician while he completed the repair. The astronaut followed the procedure and opened the hatch. Upon re-entry the latch again failed, and the astronauts were unable to secure the hatch and re-pressurize the cabin. For the second time, White tinkered with the latch system until he managed to get it to secure the hatch. During preparations for re-entry, the crew was to have opened the hatch and disposed of White’s EVA equipment; both astronauts agreed to wait and dispose of the equipment on the ground.
12. Gemini VI was launched after Gemini VII as Gemini VI A
Gemini VI was originally supposed to be launched on October 25, 1965 following the launch of an Agena Target Vehicle which it was scheduled to rendezvous with during its flight. The Agena launched but exploded in flight causing the mission to be cancelled. In December, Gemini VI was scheduled to rendezvous with the already orbiting Gemini VII, which was on a fourteen day endurance flight in a stable orbit. The first attempt to launch Gemini VI A failed on December 12, when the booster ignited and then shut down. Procedure required astronaut Wally Schirra to activate the ejection seats, but he elected not to since he had not felt the booster move. Ejection would have likely been fatal, and would have at least destroyed the spacecraft even if the astronauts had survived.
Gemini VI A was finally launched on December 15, and on its fourth orbit it achieved rendezvous with Gemini VII. Schirra was able to perform a fly around inspection of his fellow spacecraft, and the two capsules flew side by side, keeping station on each other and communicating over the radio. At one point the spacecraft were as close as one foot to each other. The rendezvous and the ability to fly together were techniques necessary for a trip to the moon, and the two American capsules performing the maneuvers exhibited clear evidence that the Americans were now ahead of the Soviets in the Space Race of the 1960s. Gemini VI withdrew to a safe distance during the sleep period following the rendezvous, which lasted four and one half hours. It returned to earth the following day.
13. Gemini VIII was the first in-space disaster which required the mission to be aborted
Gemini VIII was scheduled to be a three day mission in which the spacecraft would rendezvous with an unmanned Agena docking vehicle and dock, both steps necessary as part of the planned Apollo program. It also included a spacewalk to retrieve a piece of experimental equipment from the docking vehicle. Neil Armstrong was the Command Pilot for the mission, and David Scott was the Pilot. It was the first space mission for both men. When Gemini VIII arrived at the rendezvous with the Agena it spent about thirty minutes inspecting the docking vehicle for any damaged sustained during its launch. Finding none, Armstrong moved forward and docked the spacecraft, the first docking operation of any spacecraft.
Shortly after docking the Agena began to yaw, and Armstrong, after attempting to stop the motion using the Gemini’s thrusters, decided to undock. As Gemini withdrew from the dock, which was by then tumbling, it entered into a tumbling pattern of its own which increased in speed with the loss of mass from the dock. Armstrong’s ability as a pilot and engineer allowed him to analyze, diagnose, and correct the problem as his spacecraft was tumbling at a rate of one revolution per second. After realizing the problem was with the Gemini, the decision was made to return to earth after one more orbit, allowing them to get closer to a recovery zone. The problem was later determined to have been a malfunctioning thruster on Gemini VIII.
14. Gemini IX A was plagued with failures of other equipment.
As with the earlier Gemini VI, Gemini IX was originally scheduled to dock with an Agena docking vehicle (Agena was controlled from the ground) but the dock was destroyed during its launch failure. The mission was rescheduled to dock with another type of docking vehicle and was finally launched in early June, 1966, carrying astronauts Tom Stafford and Gene Cernan. Besides the docking operation the mission was to include a lengthy spacewalk, including the first using a type of jet pack, while untethered to the spacecraft. When the Gemini spacecraft rendezvoused with the docking vehicle it discovered that the fairing which covered the docking port had not been completely ejected following launch, rendering docking impossible.
After the failure to dock, Cernan began an EVA using a new type of suit which had been designed to resist the hot gases expelled by the Astronaut Maneuverability Unit (AMU), essentially a jet pack. The new suit, once pressurized, rendered the astronaut almost unable to move. He managed to work to the base of the spacecraft where the AMU was kept, but his heart rate reached up to 180 beats per minute, and his exertions in the hot suit caused him to sweat excessively, which in turn caused his visor to fog over, limiting his visibility. Stafford ordered the EVA ended over Cernan’s objections, recognizing the hazards which would be faced getting out of the AMU by the exhausted astronaut. Gemini IX A returned to earth later that same day.
15. Gemini X targeted two different vehicles for rendezvous
Gemini X followed the launch of an Agena Target Vehicle in July of 1966, docked with the ATV, and then used Agena’s engines to reach the highest altitude of any of the Gemini flights yet attempted, more than 400 nautical miles. Astronauts John Young, of corned beef sandwich fame, and Mike Collins, then undocked and maneuvered their spacecraft to join the dead Agena which had been docked with by Gemini VIII before that mission had to be aborted. After Gemini VIII returned to earth the ATV ground controllers had continued to maneuver the vehicle until its fuel was expended. Gemini VIII had intended to retrieve experimental equipment from the vehicle before its emergency led to its hasty departure.
Gemini X rendezvoused with the dead ATV, but made no attempt to dock with the vehicle, which had no lights. Astronaut Collins left the spacecraft on an EVA (his second EVA of the mission) and went to the Agena, where he found difficulty obtaining handholds near the docking port. He was able to reach the upper portion of the ATV, which he later reported to be in good condition, and retrieved the micrometeorite collector which was to have been picked up by Gemini VIII. As with earlier EVAs on other missions, securing the hatch following the EVA was a problem, though this time it was because of the unwieldy fifty foot umbilical Collins had used. The umbilical and chestpack required for the EVAs were later disposed of by ejecting them from the spacecraft into space.
16. Another record for altitude in space was set by Gemini XI
The ability to maneuver and dock with another vehicle to be used to boost the spacecraft out of low earth orbit was a critical phase of the planned Apollo missions, which was why it was stressed during the Gemini program. Failing to complete a docking maneuver would require a mission to the moon to be aborted. Gemini XI docked with an Agena and used it to boost its orbit to the Gemini record of 739 nautical miles, then disengaged and connected the two spacecraft with a tether. Spinning the connected vehicles created a small but measurable amount of gravity in one of the experiments conducted by astronauts Pete Conrad and Richard Gordon. The docking was done on the first orbit, simulating an ascent from the surface of the moon to an Apollo command module.
The many scientific experiments conducted by Gemini XI included the use of power tools, which were evaluated for their effectiveness and ease of use in zero-gravity conditions. Re-entry for the mission was the first for an American mission that was completely controlled by computers, and the spacecraft returned to earth less than two miles from its planned landing point, within sight of the recovery ship USS Guam. Gemini XI was the penultimate flight of the program, and one of the most successful missions of the entire space program to that point. One remaining Gemini mission was completed, during which Buzz Aldrin completed over five hours of EVA, demonstrating that many of the problems encountered on the Gemini missions had been resolved.
Gemini missions came to an end in November of 1966, and the focus of NASA and the general public was on the growing excitement over Project Apollo and the manned mission to the moon. In 1967 it was clear that the United States was far ahead of the Soviets, and American pride in the Space Program had been reinforced by the successes of the Gemini program, with its frequent launches and the reports to the public which ignored the failures, most of which they never heard of at the time. Gemini veterans Gus Grissom and Ed White were assigned to the first Apollo mission, along with rookie astronaut but veteran pilot (including of the U-2) Roger Chafee. The flight was scheduled to launch in February, with a mission of testing the Apollo command module and the ground support systems.
In January 1967, during a communications test while the capsule was on the launch pad at Cape Canaveral, a fire broke out, which in the oxygen rich atmosphere expanded quickly, splitting the side of the spacecraft, killing the three astronauts, and bringing the space program to a halt which lasted twenty months. For the first time, some of the accidents and potential accidents which had always been a part of the program were revealed as Congress investigated and the newspapers reported their findings. Support for the space program waned as its costs and potential benefits were debated. There was also a growing belief that the Soviets were no longer interested in a trip to the moon, rendering such an effort unnecessary.
In December of 1968, one of the most divisive and troubled years of American history, American astronauts Frank Borman, Jim Lovell, and Bill Anders became the first human beings in history to leave earth’s orbit and travel to the moon. The mission was changed from its original profile, which was to test the Lunar Excursion Module while in low earth orbit, in part because the LEM wasn’t ready and in part because the Soviets sent a mission to lunar orbit and returned, which carried live tortoises, on a spacecraft called Zond 5. US intelligence did not believe that the Soviets possessed the ability to land on the moon, but the flight which carried living specimens prodded NASA administrators to send American astronauts to orbit the moon as a morale builder and public relations boost.
The night before the first lunar mission was launched the astronauts were visited by Charles Lindbergh, a graphic example of how far human flight had advanced in the course of a single lifetime. The mission was far from flawless, but problems encountered were resolved sufficiently for Apollo 8 to achieve lunar orbit. On the evening of December 24, Christmas Eve, with dramatic pictures of the earth being telecast from lunar orbit, the astronauts read passages from Genesis before wishing their audience on earth a Merry Christmas. The mission to orbit the moon was a triumph for NASA, with public approbation of the space program largely restored, and the drive to walk on the moon by the end of the decade was restored.
19. The dress rehearsal took steps to ensure the astronauts wouldn’t land on the moon
Apollo 10 was a full blown dress rehearsal for a lunar landing, including approaching the lunar surface in the LEM, closing to within eight miles before activating the ascent stage engines of the LEM to return to the command module in lunar orbit. Astronauts John Young, Gene Cernan, and Tom Stafford were all veterans of space flight during the Gemini program. A lively discussion developed in the media and among the astronauts regarding the necessity of the dress rehearsal. The argument was along the lines of; Why go so far and come so close without landing? NASA administrators, well aware of the traits of the astronauts, who were likely to find some sort of excuse to go ahead with a landing once they were there, needed to find a means to prevent one.
NASA mission planners ensured that the astronauts in the LEM, Stafford and Cernan, would not attempt to usurp the first landing on the moon by limiting their fuel supply. Well aware that if the astronauts did go ahead there would be no way of disciplining them – they would be international heroes and celebrities – they instead provided only the amount of fuel necessary to return to the command module from their closest approach point. Had the LEM descended toward the lunar surface any further, there was insufficient fuel to get back to the command module. NASA administrators also ensured that the astronauts were fully aware of the nature of their supply. The dress rehearsal was a complete success, setting the stage for the mission of Apollo 11.
20. The goal achieved was the capstone of the American space program
By the end of the decade of the 1960s, the finish line of President John F. Kennedy’s challenge to the nation, four Americans had stood on the surface of the moon and returned safely to earth. Twelve Americans had seen the moon’s dark side with their own eyes. Traveling to the moon had become, in the eyes of many, routine. America turned its attention to other things. Debate arose over continuing the flights to the moon as questions over cost versus benefits attained were asked in the media and in Congress. The first mission of the 1970s was fraught with drama when an accident aboard the spacecraft threatened the lives of the crew, but the Apollo 13 mission ended in a successful rescue which again boosted national pride in the astronauts and their abilities.
The Apollo program was cut short in the 1970s, and national interest in the space program never again reached the level it attained in the drive to reach the moon. Accidents that led to fatalities during space missions, twice affecting the space shuttle, brought the space program and NASA under increased scrutiny and public disapproval. NASA has never since faced a challenge such as the one expressed by John Kennedy, nor the public support for its achievement. Despite enormous successes with unmanned probes and exploration missions, public support for manned missions steadily waned since the successes of the 1960s. Someday Americans, or others from earth, will return to the moon and will travel to other celestial bodies; when that will occur remains unknown.
Where do we find this stuff? Here are our sources: