Ici la base de la Tranquillité - Apollo XI
Here Tranquility base - Apollo XI
Ici la base de la Tranquillité
Ici la base de la Tranquillité - Apollo XI
Ici la base de la Tranquillité - Apollo XI
Ici la base de la Tranquillité - Apollo XI
Ici la base de la Tranquillité
Here Tranquility base - Apollo XI
Here Tranquility base - Apollo XI
Ici la base de la Tranquillité
Here Tranquility base - Apollo XI

The July 20th, 1969, during the Apollo 11 mission, as he just land the lunar module Eagle on the surface of the moon, Neil Armstrong said: "Houston, Tranquility Base here, the Eagle has landed".  With these words he founded the first human settlement in space.

This site aims to trace the history of this base through various documents.

Whether you have lived these moments in 1969 or later, this site will allow you to see a completely new way.

To understand all the details of that night of July 20 to 21, 1969 you can  refer to the (french) book "Ici la base de la Tranquillité"  whose research work is at he origin of the production of these documents.

Episode I : Landing

This video covers some 13 minutes of the descent of the lunar module Eagle from the point called PDI (Power Insertion Descent), that is to say from the moment he left the lunar orbit to the moon landing.

In this video are synchronized:


  • The film taken by the onboard 16mm camera

  • Movies recorded in the control room of Houston (2 cameras)

  • Live broadcasts of TV channels: CBS (USA), RAI (Italia) . ORTF (France)  not available now

  • The Earth-Moon dialogs and real-time transcription
    (in green, dialogs recorded onboard the lunar module)
  • The dialogs between flight controllers and real-time transcription
    (in green, dialogs with backroom)
  • The altitude in real time

  • The curve of altitude in real time

  • Neil Armstrong's heartbeats in real time


Episode II : First steps

This video begins when the live TV image arrives on Earth as Neil Armstrong descended the ladder of the lunar module. Then he made ​​his first step, down a camera, take some photos and collect some contingency samples. The video ends when Buzz Aldrin descended to the ground in turn. The film is also useful to show in parallel the control room of Houston and the path of the television picture and changes the receiving antenna on Earth, which explain the changes in image quality.

Are synchronized to this video:


  • The image of live television and audio exchanges Earth - Moon
  • The film recorded by the onboard  LM 16mm camera
  • The film recorded in the control room of Houston
  • The path diagram of the TV picture involving the Goldstone (GDS) antenna in the U.SA and those of Honeysuckle Creek (HSK) and Parkes in Australia.
  • The audio network NET2  on which converse the operators of the previous stations with Sydney (SYD) and Houston (HTV)
  • The transcript of the Earth-Moon as well as network NET2
  • The heartbeats of Armstrong and Aldrin in real time


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First you will find a several videos recounting the whole night of 20 to 21 July 1969 from the landing to the end of the moonwalk. Each video (called episode) covers about 20 minutes and synchronizes video sources (direct TV, onboard 16 mm, photos, ORTF, CBS, RAI)  with audio sources (Earth-Moon dialogues, dialogues between flight controllers, comments on the TV  broacast). Moreover, all these dialogues are transcripted in real time, in English or French. The videos also show the cardiograms of the astronauts and their position in real time on the lunar surface.

Currently three episodes are available: Episode I deals with the moon landing and episodes II and III deal with the first 40 minutes of the Lunar running.

There is also a museum section (only in French but with a large number of documents) aimed to compile all kinds of records that allow to reconstruct the history of the Tranquility Base.

Clic here to see the last updates



List of updates

September 18, 2013

Museum section/armstrong

September 1st, 2013

Museum section

 July 2013

New version of episode II with transcriptions in french.

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