In 1969, a giant leap was taken by science, humankind and aerospace exploration when for the first time in history men walked on the surface of the Moon, Earth’s only natural satellite. We at SP’s look back at what the mission was and how 50 years of this historic feat are being celebrated.
It is not very often that you look up to the moon shining bright in the night sky not to find expressions in its craters but to know that a fellow human is actually taking a walk on its surface. However, in 1969 this surreal moment was indeed experienced by an estimated 650 million people. 50 years ago, humankind had a literally out of the world experience in its truest form when men landed on the lunar surface leaving footprints to be etched forever.
As writes NASA (National Aeronautics and Space Administration), “On July 20, 1969, humans walked on another world for the first time in history, achieving the goal that President John F. Kennedy had set in 1961 before Americans had even orbited the Earth”. When the President announced this, not enough was even known about the lunar surface and its geology yet eight years hence, the ‘giant leap’ was successfully taken. As NASA managed to accomplish this challenge with the Apollo programme, a way was paved for expeditions beyond our home planet. Apollo was the NASA programme that resulted in American astronauts’ making a total of 11 spaceflights and walking on the moon.
The lunar landing mission with a crew aboard and a safe return back to the Earth included dodging a lunar crater and boulder field, exploring the area around the lunar landing site, collecting soil and rock samples, setting up experiments, planting an American flag and leaving behind medallions and a commemorative plaque signed by President Richard M. Nixon and the three astronauts that stated, “We came in peace for all mankind.”
Seated atop the three-stage 363-foot rocket, Saturn V, at Launch Complex 39A at the Kennedy Space Center, Apollo 11 astronauts Commander Neil Armstrong, Command Module Pilot Michael Collins and Lunar Module Pilot Edwin “Buzz” Aldrin were ready to reach the moon.
The central focus of the mission remained to perform crewed landing on the moon’s surface and a safe return to the Earth. But there were other objectives too that included exploration of the lunar surface by the crew as well as the lunar module called the Eagle.
On July 16, 1969, Apollo 11 was launched from Cape Kennedy into an initial Earth-orbit of 114 by 116 miles.
At about 109 hours, 43 minutes into the flight, history was made as the first human footstep on the lunar surface was taken by Armstrong while he echoed, “A small step for a man, a giant leap for mankind”. He was followed by Aldrin 20 minutes later and about half an hour later the astronauts had a word with President Nixon by telephone link.
On July 18, Armstrong and Aldrin climbed from the Command Module, Columbia, to Eagle and the next day came the first lunar orbit insertion maneuver.
On July 20, both the astronauts entered the Lunar Module again and ‘at 100 hours, 12 minutes into the flight, the Eagle undocked and separated from Columbia for visual inspection’.
Post 102 hours, 45 minutes, the Eagle landed in the Sea of Tranquility region of the moon. Occurring almost one-and-a-half minutes earlier than scheduled, the touchdown included a powered descent that ran a mere nominal 40 seconds longer than preflight planning due to translation maneuvers to avoid a crater during the final phase of landing. Almost four hours later, Armstrong appeared from the Eagle and deployed the TV camera for the transmission of the event to Earth.
At about 109 hours, 43 minutes into the flight, history was made as the first human footstep on the lunar surface was taken by Armstrong while he echoed, “That’s one small step for a man, one giant leap for mankind.” He was followed by Aldrin 20 minutes later and about half an hour later the astronauts had a word with President Nixon by telephone link.
NASA also recalls that commemorative medallions bearing the names of the three Apollo 1 astronauts who lost their lives in a launchpad fire and two cosmonauts who also died in accidents were left on the moon’s surface. A one-and-a-half-inch silicon disk, containing microminiaturized goodwill messages from 73 countries, and the names of congressional and NASA leaders also stayed behind.
Armstrong and Aldrin spent 21 hours, 36 minutes on the surface of the moon and about two-and-a-half hours from this entire time was invested in the EVA (Extra-vehicular Activity) phase. After spending one hour, 33 minutes on the surface, Aldrin who aptly described his surroundings while on the moon as a ‘magnificent desolation’ re-entered the Eagle, followed by Armstrong, 41 minutes later.
The ascent stage engine was fired at 124 hours, 22 minutes and the tans-Earth injection of the CSM (command and service modular) began on July 21. Following this, the astronauts slept for about 10 hours. 44 hours after leaving lunar orbit, the re-entry procedures were initiated on July 24.
After a flight of 195 hours, 18 minutes, 35 seconds – about 36 minutes longer than planned – Apollo 11 splashed down in the Pacific Ocean on July 24, 1969, 13 miles from the recovery ship USS Hornet. Because of bad weather in the target area, the landing point was changed by about 250 miles.
As reported by NASA, in a post-flight press conference, Armstrong calls the flight “a beginning of a new age,” while Collins talks about future journeys to Mars. Over the next three and a half years, 10 astronauts followed in their footsteps.
The samples collected from the moon were carefully analysed in quarantine and the astronauts were straight kept in quarantine for 21 days in a Mobile Quarantine Facility (MQF) to avoid any ‘moon plague’. They had collected 47 lbs of moon rocks and had taken 166 pictures.
On July 26, Hornet arrived on Pearl Harbor with the astronauts in the MQF and Columbia to be greeted by as many as 2,500 well-wishers. President Nixon welcomed home the Apollo 11 astronauts, sealed in the MQF and spoke to them through telephone. The celebrations within the NASA mission control room were unmatched but were shared by citizens around the globe with newspapers, radio, televisions, and documents, flooded with this historic mission.
50 YEARS LATER, CELEBRATIONS CONTINUE
From Google Doodle bringing the world’s attention to 50 years of the historic Apollo 11 mission, to public screenings and real-time videos of the mission to many other events that included exhibits, speakers, demonstrations, interviews, documentaries and a host of fun activities, the entire world celebrated 50 years since the first human set a foot on Earth’s sole natural satellite, the Moon.