Questions tagged [apollo-11]

Apollo 11 landed the first humans, Neil Armstrong and Buzz Aldrin, on the surface of the Moon on July 20, 1969.

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Apollo 11 mission report shows velocity well below escape velocity thousands of km on the way to the Moon

This is from the Apollo 11 mission report. It says the vehicle was going at 7.6 km/s when the CSM separated from the third stage. It was not in orbit at this point, it was thousands of KM from earth. ...
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Who were the major manufacturers of the Apollo 11 rocket?

Organizing an exhibition around photographs from the 1969 launch and wanted to invite manufacturers.
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Luna 15 - Any official confirmation of objectives?

Russia's Luna 15 crashed into the lunar surface shortly after Apollo 11 landed. It's widely considered a failed sample return mission, but did Russia ever officially announce that sample return was ...
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Apollo 11 first stage separation

Did Apollo 11 climb vertically upwards i.e. radially outwards, or "normal" to earth surface till it separated its first stage (approximately 38 Miles/60 Km or so..), or did it tilt at or ...
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What are “uncoupled attitude maneuvers” and why do them?

This answer to the question Apollo-11 delta-v “due to residual pressure in the docking tunnel pushing the spacecraft apart” detected as it happened? Was it corrected? quotes the following passage from ...
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Apollo 11 trajectory logs [duplicate]

is there any place where to download the log files of the entire Apollo 11 mission? I want to rebuild it in Matlab and I'd use it as reference. I've seen that there is AGI's reconstruition with STK, ...
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Apollo-11 AGC core memory has 5 wires per core (rather than 3 or 4) - why?

Apollo-11 AGC core memory has 5 wires per core (rather than 3 or 4) - why? I am referring to this image in Wikipedia: https://en.wikipedia.org/wiki/Apollo_Guidance_Computer#/media/File:...
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How serious was the leaky hydrogen valve on the Apollo 11 mission?

The recent Apollo 11 documentary highlighted that the rocket suffered a 'hydrogen valve leak' in the hours prior to launch. Technicians were still trying to fix it even as the astronauts were boarding,...
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What's the story behind this Apollo-era image?

This photo has been bothering me for quite a while, so I decided to look into it further. It is shown in Wikipedia's Opposition Surge article, which is a fascinating topic that I'd like to avoid here ...
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Apollo 11 ascent data/observation mismatch

I'm researching the Apollo 11 ascent to orbit and found an article showing a mismatch between the observation and the Boeing data The launch video shows the rocket punching through what appears to be ...
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What is the constant g-phase in Apollo re-entry, and why does it not show up on the graph?

On the Apollo 11 Flight Journal Day 9: Re-entry and Splashdown, it says something about the "Constant g-phase". This is what the ALSJ says: Planned drag level (deceleration) during the ...
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Where is the Neil Armstrong interview I heard on Fresh Air with Terry Gross?

A couple of years ago I heard Neil Armstrong interviewed by Terry Gross on NPR's Fresh Air. He was talking about manually piloting the Apollo 11 lunar module in extremely stressful conditions. Terry ...
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What do these Apollo era terms mean?

@Ludo's answer to If I wanted to reconstruct an entire Apollo mission's crewed spacecraft trajectories, what are the key sources of historical data I'd look for? links to Apollo Mission 11, ...
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Why do the two Apollo 11 PSEP solar panels appear to have different backing materials?

The PSEP (Passive Seismic Experiment Package) was powered by a pair of solar panels mounted on extended arms. The one on the left (when looking towards the LEM) appears to have a matt grey backing: ...
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What did Apollo 11's SSTV signal sound like?

The TV signal from Apollo 11 had limited bandwidth, and an oddball format was used to send and convert the signal. All of the modern SSTV demos I've seen on YouTube seem to take around a minute to ...
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What is the meaning of “Bravo”?

There is movie called, " First Man (2018), which is about Apollo 11 mission. CAPCOM-APOLLO 11 speaks to Apollo 11 crew: CAPCOM-APOLLO 11: Apollo 11, now entering lunar orbit. Your roll should ...
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Length of shadows apollo 11

Apollo 11 Landing: 102.75 GET EVA Start: 109.00 GET, 14.0 deg. Finis: 111.75 GET, 15.4 deg. According to NASAs website the sun angles during apollo 11 mission is the ones stated above. At 15 deg ...
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How was a safe tilt angle ensured for liftoff of the Apollo LM?

Recently I read that one of the pre-conditions (among many others) of a successful lift off of the LM ascend stage, from the moon surface, was that the LM ascend stage "axis" should be "...
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Was there any effort made to have Apollo 11 land on July 4? [duplicate]

President Kennedy set a goal of landing a manned mission on the moon by the end of the 1960s, as stated in his well-known speech to Congress on 25 May 1961 ("I believe that this nation should commit ...
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Apollo 11 Moon orbital elements [duplicate]

I'm simulating several pieces of the Apollo 11 mission. I'm now at the point of performing lunar landing sequence, and I'm looking for data. I found this report, but it only has partial data, while ...
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What's the “thump” I hear listening to Apollo 11 playback?

I've been listening to live playback of the Apollo 11 mission at https://apolloinrealtime.org/11/ Besides the expected static and hums, from time-to-time I hear a "thump", sometimes one, sometimes ...
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What were the chances of failing the Apollo 11 mission? [duplicate]

What were the chances of the Apollo 11 mission failing? Consider the following scenarios: least one of the crewmembers dying, failing to land on the Moon, unable to return to Earth, the Soviets ...
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Details of Apollo 11 video transmission [duplicate]

NASA has the video of Neil Armstrong on the moon. I'm interesting in the technology how the signal was created and transmitted. There are some details about it in Wikipedia but I'd like to know in-...
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The speed of Apollo 11 at first stage separation was apparently only about 40% of what NASA claims? What does this indicate?

The second stage of Apollo 11 generated a greater than 20 deg shock-wave half angle which corresponds to less than $1000 \frac{m}{s}$ forward speed not 6000 mph ($2682.24 \frac{m}{s}$)? I measured ...
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Computers for Apollo Mission

Why did NASA invest so much amount of time and money on developing computers for Apollo Missions? Wouldn't the Man on Moon mission have been far easier and faster if the Astronauts drove the ...
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Lot 345 of Christie's “Voyage To Another World” auction supposedly has the only photo of Armstrong on the Moon, but isn't this one also?

Christie's press release Christie's Voyage to Another World: The Victor Martrin-Malburet Photograph Collection includes the following: Lot 345, The only photograph of Neil Armstrong on the Moon, July ...

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