Tuesday, November 24, 2009

Apollo 9

Read about Apollo 8

Apollo 9 would play a pivotal role in the first manned moon landing because the crew would test many of the critical components to the Apollo 11 mission. The crew was headed by Gemini veteran Jim McDivitt. His Command Module Pilot was another Gemini veteran from the third group of astronauts, David Scott. Filling the final position of Lunar Module Pilot was young looking Rusty Schweickart whose first and only flight would occur on Apollo 9. The Lunar Module (LM or lem) would truly be tested in this mission, for the first time. However, there were many other mission parameters which will be discussed shortly.

First the crew separated from the craft containing the lem and used the command module to dock with it and unload it. After this was performed, the crew was connected to the lem and actually transferred from one to the other without using spacesuits.

Schweickart was supposed to perform an EVA, but he became ill with space sickness during the first day and his tests were scrapped for his safety. However, Schweickart recovered and performed some of the tests. However, he was able to prove that the new Apollo spacesuit could perform without an umbilical lifeline to the ship. To do this, Schweickart carried a backpack which functioned as life support for this suit. It would be used again for every Apollo mission.

Following this, there was one craft that had to be tested before Apollo could move forward. The LM would have to function in space, and its engines would have to work. McDivitt and Schweickart would take out the LM for this maiden voyage. The craft worked as it was supposed to, and the mission was a complete success. After this mission, the only member of the crew who would fly again would be David Scott.

Read about Apollo 10

Monday, November 23, 2009

The Lunar Module

Hey everyone,

For man to land on the moon, they would need a vehicle capable of landing on the surface and taking off again. However, at first, there was some discussion on what to send to the moon. Some suggested taking a large craft to the moon weighing a significant amount more than the final product would. This was a direct ascent approach or an Earth rendezvous approach. However, both of these methods would require landing the entire spacecraft on the moon. By using a lunar orbit rendezvous, only a small craft would land on the moon while another stay in orbit. Once finished on the surface, the two would reconnect in lunar orbit. After this plan was accepted, the Lunar Excursion Module (LEM) would be constructed mainly by the Grumann Aircraft Engineering with Tom Kelly as the chief designer. During this process, weight was a constant concern. To save weight, windows were made small, seats were even removed and replaced by velco so the astronauts could stand and see out the windows, and even shielding was removed and replaced by a thin sheet. However, the LEM would never fail and prove all the critics wrong. The final change before it would see space was from the Lunar Excursion Module to the Lunar Module, but it was still known as the LEM.

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Sunday, November 22, 2009

A shameless plug

Hey everyone,

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Apollo 8

Hey everyone,

The end of the decade was quickly approaching as the Apollo Program moved forward. The second manned Apollo was meant to test the Lunar Module, but its construction was behind schedule. A bold plan was instated. They would switch the Apollo 8 and 9 missions and add to the new Apollo 8 mission. Just before the end of 1968, the crew of Apollo 8 would journey to the moon and back, assuming all went well. The crew would include Commander Frank Borman, CMP Jim Lovell, and LMP Bill Anders. Borman and Lovell had flown together before on Gemini VII, but this was Anders first spaceflight. The Saturn V rocket would be used for this flight. However, with the quick change, the crew didn't have as much time to train and spent seven hours in training for every actual hour of the mission. However, in a year fraught with unrest, assassinations, and an escalation in Vietman, the nation looked to Apollo 8 as a sign of hope. They launched on December 21, 1968 and were the first men to escape low Earth orbit as they began their journey to the moon. The flight to the moon was fairly lackadaisical except that Borman became sick. He experienced vomiting and diarrhea; however, he soon recovered and the mission continued without incident. The crew journeyed around the moon and entered orbit, and, for the first time, man saw the far side of the moon with their naked eyes. While orbiting the moon, they surveyed the surface looking for future landing sites. As the fourth orbit approached, the crew witnessed an Earthrise leaving them speechless and providing one of the most common images from space. During their ninth orbit, they addressed Earth and, famously, read from Genesis. After wishing the Earth a merry Christmas, they signed off. Before they could leave the moon's orbit, they had to perform a burn to return them to Earth which was the most critical aspect of the mission. If it failed, they would be stuck in orbit and would eventually die. However, the burn worked, and they returned to Earth. Lovell would accidentally cause the craft to deviate off course, and they would have to manually re-align on their return journey. After this, the mission finished without a hitch and a normal splashdown. After landing, the crew was named Time's Man of the Year even though their feat had occurred just before the new year. They won because they were the first men to travel to leave Earth's orbit, travel to another celestial being, and return from that celestial being. However, their feat would be topped soon enough.

Saturday, November 21, 2009

Apollo 7

Hey everyone,

On October 11, 1968, Apollo 7 launched into space with the crew of Wally Schirra, Donn Eisele, and Walter Cunningham. The Apollo crews would have the new positions of Commander, Command Module Pilot (CMP), and the Lunar Module Pilot (LMP). Schirra was the Commander while Eisele (CMP) and Cunningham (LMP) would have lesser positions. This would be Schirra's last spaceflight, and he would be the only man to fly Mercury, Gemini, and Apollo missions. However, no manned flight had occurred since the tragedy of Apollo 1 placing some pressure on this flight for success. Schirra was an excellent candidate for this mission because he was meticulous when it came to safety. Before the flight, he asked that an abort be instated in case of a significant wind on the launchpad. If they were to launch on a very windy day and had to abort, the wind could blow them back ashore causing the astronauts to be harmed or even killed. Schirra's demand was instated, but the launch went smoothly. However, in space, the crew became irritable after they developed motion sickness due to the larger space provided for the astronauts. Schirra soon developed a bad head cold, and he began to refuse requests. Likewise, the other crew became irritable. This "talking back" led to Eisele and Cunningham being omitted from later crews. Still, the mission was successful and was instrumental in the impromptu mission alteration for Apollo 8.

Friday, November 20, 2009

Saturn V

Hey everyone,

The dream of sending a man to the moon and returning him safely to Earth was in reach after Project Gemini. But, man would need a rocket to travel to the moon carrying more mass than ever before. This rocket would prove to be the largest rocket ever built by far. The Saturn V booster would be this rocket. The initial work on a Saturn V relative would begin in 1960, and they would begin plans on the Saturn V in 1962. By 1963, it was confirmed as the rocket for the Apollo missions. Wernher von Braun was the architect of this rocket, fulfilling a long time dream for the man. The finished product would stand 363 feet tall and use 6,500,000 pounds of fuel. Like other rockets, this was a multi-stage rocket which had three stages. The first stage had five engines and used kerosene type fuel with liquid oxygen. The second stage also had five engines and used liquid hydrogen and oxygen. The third stage used a single engine for a final push into space with liquid hydrogen and oxygen. Before men would ride this rocket, there would be two unmanned launches of this rocket with the Apollo 4 and 6. Four was successful while six had some serious problems. However, the rocket has 2,000 moving parts, and anyone of these parts failing could cause serious problems. The work had to be literally flawless, and it was consistently. This rocket is the pinnacle of science and an amazing feat considering that rocketry was still young (40 years old) and space flight was very young (12 years old). While the rocket worked, other missions would have to be flown before man would walk on the moon.

Thursday, November 19, 2009

Apollo I

Hey everyone,

After several unmanned flights, the first manned Apollo spaceflight would have a Mercury and Gemini veteran at its helm, Virgil "Gus" Grissom. The second member had conducted the first American space walk, Edward White, and the third member was a smart astronaut from the newest group of astronauts named Roger Chaffee. The crew began to prepare for the launch in late 1966. There were a few issues including communication between the ship and the ground control as well as fire safety issues. On January 27, 1967, during a routine plugs out test was conducted. This is where the craft is sealed and run under its own power. However, an accident occurred. The cabin was filled pure oxygen when a faulty wire caused was a spark. This quickly exploded into a fire which engulfed the entire cabin. The men reacted as they should. They shouted "fire" and began the procedure to open the door. Within 30 seconds, the cabin door exploded outwards, and the crew was dead. The pressure from the expansion of air due to the heat made the door unable to open. The crew wasn't removed from the craft for hours due to various hazards to others. Asphyxiation killed Grissom, White, and Chaffee, but there were others who said it was poor design, rushed construction, and carelessness. Congressional hearings were held on the matter. There was fear that Apollo was done, but it was allowed to continue. Doors were made to open outward and had an explosive charge for emergencies. This accident actually facilitated safety and prevented many other deaths. Still, it's just terrible that it had to come at the cost of three lives. However, Grissom himself said, "If we die, we want people to accept it. We are in a risky business and we hope that if anything happens to us it will not delay the program. The conquest of space is worth the risk of life". I, wholeheartedly, again.

Wednesday, November 18, 2009

May 25, 1961

Hey everyone,

The Apollo Program which proposed that a man be sent to the moon was conceived as early as the Eisenhower administration. However, it wasn't until May 25th, 1961 that this program began moving forward. On this date, Kennedy addressed congress. His statement was this "...I believe that this nation should commit itself to achieving the goal, before this decade is out, of landing a man on the Moon and returning him safely to the Earth. No single space project in this period will be more impressive to mankind, or more important in the long-range exploration of space; and none will be so difficult or expensive to accomplish". This was just weeks after Alan Shepard had launched into space for fifteen minutes. The goal was bold, to say the least. Over the 8 years and more that followed, 400,000 people would work towards this goal and tens of billions would be spent on this endeavor. President Kennedy would publicly push this goal, especially in a speech made at Rice University on September 12, 1962. In this speech, Kennedy stated that "No nation which expects to be the leader of other nations can expect to stay behind in this race for space" and "we choose to go to the Moon in this decade and do the other things, not because they are easy, but because they are hard". However, President Kennedy would not live to see this dream after succumbing to an assassin's bullet just fourteen months after this speech. Even after this death, Project Gemini would move towards this goal, and, by the beginning of 1967, the moon appeared to be a tangible goal. But, tragedy would stop it dead in its tracks.

Tuesday, November 17, 2009

Gemini: The Crews (An overview)

Hey everyone,

The manned crews of Gemini are as follows:

Gemini III (Command Pilot first, Pilot second):

Virgil "Gus" Grissom

John Young

Gemini IV:

James McDivitt

Edward White

Gemini V:

L. Gordon Cooper

Charles "Pete" Conrad

Gemini VI:

Wally Schirra

Thomas Stafford

Gemini VII:

Frank Borman

James Lovell

Gemini VII:

Neil Armstrong

David Scott

Gemini IX:

Thomas Stafford

Eugene Cernan

Gemini X:

John Young

Michael Collins

Gemini XI:

Charles "Pete" Conrad

Richard Gordon

Gemini XII:

James Lovell

Edwin "Buzz" Aldwin

Gemini XI and XII

Hey everyone,

Project Gemini was coming to an end as the Project Apollo was slotted to begin. There were only two flights left. The Gemini XI mission would be flown by Charles "Pete" Conrad and Richard Gordon. Conrad wanted to fly a mission around the moon, but this wouldn't happen (eventually, his wish would come true). However, they did rendezvous immediately after reaching orbit with the Agena to simulate a lunar rendezvous. Gordon made two spacewalks, but he succumbed to exhaustion as other space walkers had. Another EVA was attempted, but it was just a stand up space walk. However, they would reach the highest Earth orbit by an American manned spacecraft, a record that still stands today. They also conducted experiments relating to the human body as had the other Gemini missions. Re-entry was done by computer and landed 4.5km from their intended landing site.

The final manned Gemini flight would have to prove that a man could maneuver easily and work efficiently outside the craft. Jim Lovell and Edwin "Buzz" Aldrin manned this mission which utilized underwater training to simulate space. Foot holds and hand bars were introduced to the spacecraft for increased maneuvering. The other aspects of the mission were routine at this point. Finally,all of the Project Gemini objectives had been completed. With 1967 looming, time was running out, and the goal of the moon by December 31st, 1969 would need a major step forward. The journey would be fraught with excitement as well as tragedy. However, the tragedy came first.

Gemini X

Hey everyone,

Gemini X was the third to last manned flight of Project Gemini. John Young would command this flight with Michael Collins as his Pilot. This mission set bold objectives which were supposed to be accomplished in the previous two missions. This mission would include two rendezvous and two EVAs. The first rendezvous and EVA were simple and executed with ease. The crew docked with their Agena craft for their first rendezvous and Collins stood in the open hatch and took pictures during his first EVA. Soon, they undocked from the Agena and set a course for the Gemini VIII Agena. After some difficulty, they found it and floated 3 meters away from it. Collins began his second EVA where he retrieved a Micrometeorite Collector from their Agena, but he also space walked over to the other Agena and collected the Micrometeorite Collector from that craft as well. A gas gun, used for mobility, was also being tested. Collins used it to move around the Gemini X craft, but it would fail after 25 minutes which would end the EVA. It would take eight minutes to finally close the hatch once Collins was inside again showing the difficulties of space walks. A few other experiments were conducted during the mission, and this mission showed that radiation at high altitude was not a problem. No major problems occurred during the flight, and they returned to Earth after three days in space.

Friday, November 13, 2009

Gemini 9A

Hey everyone,

Gemini 9A was the 7th manned flight of Project Gemini. The original crew of Elliot See and Charles Basset were killed in an airplane crash outside of St. Louis, MO in 1966. They were replaced by Thomas Stafford and Eugene Cernan. Again, they would rendezvous with an Agena vehicle and attempt a space walk. The first launch of the Agena failed and another rocket was launched two weeks later. The rendezvous was successful, but Cernan's EVA was another story. Cernan struggled with his tasks and fell behind quickly as his visor fogged. At the rear of the ship was the Astronaut Maneuvering Unit (AMU) which was a rocket pack type device, but a lack of hand and foot holds with the fogged visor soon caused exhaustion. His heart rate soared to 195 beats per minutes which led to the shortening of the EVA. Cernan had been outside the craft for 128 minutes. After conducting a few experiments, they prepared for re-entry and splashed down within 700 meters of their intended landing. The EVA problems would later resolved.

Gemini VIII

Hey everyone,

Gemini VIII was the sixth manned space flight of Project Gemini with Neil Armstrong as the command pilot and David Scott as the pilot. This would be their first spaceflight. There were two primary objectives for this mission: to accomplish an in-orbit rendezvous and docking and to accomplish an extended EVA. The vehicle with which they were to dock was known as the Agena. It was launched the same day as the Gemini VIII crew and would dock the same day. They approached the craft slowly and inspected it once they flew near the craft. After confirming that there was no damage, Armstrong docked with the Agena, and their first objective was complete. The mission would continue with the Agena attached, and the craft would aid in steering. After executing a turn with the Agena, the craft started to roll. Eventually, the roll would be able to be fixed, so they undocked with the Agena. However, the roll began again. The roll would reach one revolution per second putting the lives of the astronauts in danger. Finally, on the verge of blackout, Armstrong used the Re-entry Control System reaction control system (RCS) to stop the spin. It worked, but the mission was now done due to mission parameters that stated a mission had to be aborted once the RCS was activated. They orbited once before they re-entered and landed. The Pacific Ocean near Japan was the landing site. Due to their excellent ability and cool headedness in handling the situation, Armstrong and Scott were given prominent roles in later spaceflights. Of course, these will be discussed in later posts.

Wednesday, November 11, 2009

Gemini VIa and VII

Hey everyone,

Gemini VIa and VII were the first spaceships to rendezvous in space. While this would accomplish one of the primary objectives of Project Gemini, many problems would have to be overcome. Gemini VIa was manned by Wally Schirra and Thomas Stafford. However, their first launch attempt failed when a plug fell out of the bottom of the rocket, starting the onboard computer. When no upward motion was detected, the mission was automatically aborted by the computer. However, Schirra and Stafford did not eject from the craft like the mission rules dictated. Schirra made this decision, and the crew walked off of the spacecraft. This was the second major problem for the Gemini VIa crew. The first occurred when an Agena Target Vehicle (see Gemini VIII) failed soon after launch which caused an abort of their first launch. Finally, on the third attempt, they launched into space where they met up with Gemini VII which was manned by Frank Borman and Jim Lovell. They launched before Gemini VIa and were in space for 14 days. Gemini VIa met up with the other craft, and they rendezvoused for a time. Gemini VIa soon left for re-entry and landing which was very accurate. Upon this re-entry and landing, another objective of Project Gemini had been accomplished by the crew of Gemini VIa. Project Gemini would continue with Gemini VIII.

Monday, November 9, 2009

Gemini V

Hey everyone,

Project Gemini continued with its third manned spaceflight. L. Gordon Cooper, a Mercury veteran, acted as the Command Pilot for this mission while Charles "Pete" Conrad was the Pilot. The flight lasted 8 days and had a practice space rendezvous which proved unsuccessful. Problems began to develop with fuel cells and several experiments were canceled. The astronauts had some down time in space, and Conrad remarked that he hadn't brought a book. They returned to Earth safely, but Cooper would not fly again after Gemini. Conrad on the other hand would have a storied career in space. Other flights would address the rendezvous problems and continue towards the goal of the moon.

P. S. Sorry for the short length.

Wednesday, November 4, 2009

Gemini IV

Hey everyone,

In June 1965, Gemini IV took flight with the crew of James McDivitt and Edward White. McDivitt was the Command Pilot and White the Pilot. This was the first multi-day flight by the United States which showed that people could journey to the moon safely and return. They would also attempt a rendezvous, but this would not be successful. After Leonov's space walk in April, the United States moved up their plans for a spacewalk to Gemini IV. White executed this Extra Vehicular Activity (EVA) without a hitch for 22 minutes. He was instructed to come back in at 15 minutes, but, due to a delay in communications, he didn't immediately receive this message which accounts for the last seven minutes. White passed Leonov by a full ten minutes on his walk to history. The rest of the mission continued smoothly and an overall Gemini objective had been met. McDivitt would fly again, but White would not, but that's a later post.

Tuesday, November 3, 2009

Alexey Leonov and the first space walk

Hey everyone,

On March 18, 1965, Alexey Leonov became the first human being to walk in space. The walk only lasted for 12 minutes and 9 seconds, but he walked into history. Only a 5.35 meter tether attached to him to the spacecraft. The suit soon expanded due to the vacuum of space, and he was not able to re-enter the craft at first. Using a valve, he let off the air which allowed him to re-enter the craft. Leonov was part of the original 20 cosmonauts chosen for space travel. Had the Soviets continued to win the space race, Leonov would probably have been the first man to walk on the moon. These missions would be canceled when the Soviets fell behind in the space race. Leonov would train astronauts until his retirement in 1991.