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Light Years Ahead | The 1969 Apollo Guidance Computer
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22.3K Subs
2,476,068 Views • Feb 4, 2020 • Click to toggle off description
Half a century ago, on 20 July 1969, Neil Armstrong was in the final stages of the lunar descent, just a few thousand feet above the surface, when suddenly his on-board computer indicated a critical alarm. For three nail-biting seconds it looked as if the mission would have to be aborted. However, Armstrong was given a "go" to continue, and after several more alarms the Eagle touched down safely on the Moon.

Robert Wills introduces the amazing hardware and software that made up the Apollo Guidance Computer, walks you through the landing procedure step-by-step, and talks about the pioneering design principles that were used to make the landing software robust against any failure. He also explains the problems that occurred during the Apollo 11 landing, and shows you how the Apollo Guidance Computer played its part in saving the mission.

Chapters:
00:00 Welcome to TNMOC and introduction
04:50 The Apollo Guidance Computer, AGC
19:36 Demo
13:08 How to land on the moon
47:53 The eventful landing
1:00:37 Questions and answers

Recorded: 26th October, 2019.
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Views : 2,476,068
Genre: Science & Technology
Date of upload: Feb 4, 2020 ^^


Rating : 4.896 (1,256/47,156 LTDR)
RYD date created : 2022-04-09T09:50:01.070767Z
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YouTube Comments - 7,338 Comments

Top Comments of this video!! :3

@MichaelHeinrich1

1 week ago

2024 and it's not the first time i've watched it. Thank you so much for this great explanation.

5 |

@philippebruno8039

3 years ago

No fancy bells and whistles, just a simple deck of slides... But an outstanding and passionate communicator who can actually make you feel smart just by listening to him explaining complex things with simple illustrations. Highly recommended!

2.1K |

@kevvywevvywoo

2 years ago

The joy for me in this talk is watching the expert clearly admiring and respecting the design of his forebears. His enthusiasm is infectious.

509 |

@KrefelderBusfahrer

1 year ago

YouTube algorithm: Here, watch this 80 minute talk about the Apollo Guidance Computer. Me: Pfff, yeah right. Click Me: You know, actually I am an Apollo Guidance Computer expert myself. Thanks for this awesome presenation! Really well done!

35 |

@brownajb

3 years ago

When this popped up on my recommended list, I thought that there was no way I’d sit and watch some guy drone on about the Apollo Guidance Computer for 80 minutes. No way possible. But I did watch the whole thing. And I’ll give my boy his props: Robert Willis is an excellent communicator, doing an outstanding job explaining a well-known but still arcane event.

1.6K |

@capitaloz

3 years ago

Thank you YouTube recommendations algorithm.

979 |

@georgefarr3906

1 year ago

THis was an absolutely fantastic lecture. I’ve watched hours of Apollo footage and read dozens of books about the program and yet learned so much from this young man. I hope he writes a book because his research and thoughts need to be memorialized beyond YouTube. Bravo young man!

229 |

@johnsutherland168

1 year ago

Having worked on Apollo at MIT/IL, this is an excellent presentation. Very well done. I should also note that while doing the AGC (Apollo Guidance Computer) programming, we had two types of simulations that we could run to test and validate the navigation software. One simulation was completely digital in nature and we ran those simulations on an IBM 360 computer. The second simulation was a real time hardware simulation done in a mock-up of the command module (CM) and the lunar excursion module (LEM). The astronauts would come and get their first training on the AGC at MIT/IL, then get further training in Houston.

132 |

@Maria-hm4xm

3 years ago

As a programmer at NASA Houston from 1967 to 1973 I really enjoyed Roberts presentation. Brought back memories from a bygone age. His comment about programming in those days being like the wild wild west is very true. In the days before computer science degrees, if you had any computer knowledge, you were hired. A math degree with two computer classes qualified me.

713 |

@grumblekin

3 years ago

This is the best thing that the algorithm has recommended this year. Good job, YouTube

1.2K |

@flyingdutchy01

3 months ago

never would i have thought i'd watch through 1,5 hours about the Apollo Computer but here I am. Great content!

7 |

@boropark12

3 months ago

I think this teacher gives a great delivery. He's very precise, down to earth (no pun intend) and has a way to make complicated things very simple. I'm Very grateful to have learned these new things. 🙏

5 |

@tekinsal8396

3 years ago

I'd never imagine I'd sit and watch this for an hour, but I actually did, this guy must be really good.

315 |

@richardrazgaitis6055

2 years ago

I was part of the Launch Team at Cape Kennedy for all the Apollo's from #1 (sadly there for the fire on Pad 34) through #11, the first lunar landing. I've met a number of the lunar astronauts including Buzz Aldrin. So I knew bits and pieces of this story, and recall vividly the real-time experience of watching the landing and hearing reference to those alarms on descent of 11, but never knew the whole story until this wonderful presentation here. This was a great combination of technical details and overall mission operation. Really really well done. The speaker mentioned 400,000 people who had worked on Saturn / Apollo. The exact number is probably unknowable but the conclusion that cite leads to is right: it took the energy, invention, and genius of an incredible number of people of all walks of life that solved thousands, perhaps tens of thousands, of never-before-solved problems, all in a very very short time period. President Kennedy's speech was May 24, 1961 giving the challenge of the Landing by the end of the decade, and it was achieved twice (Apollo 11 and 12) before the end of 1969. And getting men-to-the-moon, circumnavigating it, was accomplished before the end of 1968 in Apollo 8 (Borman, Lovell, and Anders). All this, and the soon to follow Apollo fights and landings, was accomplished despite the massive setback of the deaths of three key astronauts (Grissom, White, and Chaffee) in January 1967 in the very first Apollo command module, when at that time no lunar module was even near flight ready, and Apollo 1 was atop the smaller / simpler Saturn 1B (earth orbit only rocket), while undergoing 'only' electrical testing weeks before even the first earth-orbit-only flight was to be attempted. Richard Nixon, who was President at the time of Apollo 11, called it "the greatest week in history since the Creation;" that's a little over the top...but Apollo 11 does rank somewhere pretty high in the historical list of achievements.

595 |

@coma13794

5 months ago

I bet some might judge the speaker on first appearance with his small quirks and deliberate pauses... but by God that man can present. What an absolute page turned! His ability to take a complex process and break it down, keeping you comfy the whole time is perfect. I hope he knows how much people enjoyed and appreciated. Thankful that YT exists... what a shame if only that small room full of ppl saw him!

7 |

@FixitDave

2 years ago

Robert is a passionate presenter and when he speaks about the subject he is able to portray the events in such a simplistic and understandable way to anybody who is watching...very captivating and enjoyed every second!

86 |

@kerrykikker

3 years ago

Unmissable You Tube Gold. Riveting story, timeless historic topic, enthusiastic presenter, easily understood info. enjoy.

144 |

@AhhMishMoneypenny

2 years ago

No way am I watching a vid for 1.5 hours….1.5 hours later…that was really interesting! Great presentation. 👍

7 |

@bando404

6 months ago

This is my favorite video over 30 minutes on all of YouTube! I am an Apollo nerd but all the pop literature I have found is focused on the rockets and the people. That’s very cool too, but this stuff is not prevalent enough in pop literature. This talk is exactly right. I love it!

12 |

@jazzper_nl

5 months ago

This really tickled the inner nerd in me. The story, your presentation, the sharp questions and answers. Totally worth the watch!

15 |

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