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Tranquility Base (Apollo 11 landing site)

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The Apollo 11 landing site, on the southwestern Mare Tranquillitatis. Eagle set down here on 20 July 1969. The descent stage, the Passive Seismic Experiment package, the Laser Ranging Retroreflector, a United States flag, discarded equipment and the crews' bootprints all remain, imaged from orbit by the Lunar Reconnaissance Orbiter Camera since 2009 — the LROC data give the descent stage's position as 0.67408° N, 23.47297° E in the IAU lunar reference frame. The retroreflector is still ranged by laser from Earth, measuring the Earth–Moon distance to millimetre precision more than half a century later. The site was chosen for flatness, good Lunar Orbiter mapping coverage, an approach path clear of rough terrain, and a low-energy trajectory from an equatorial parking orbit.

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Evidence · 2
Timeline

No dated observations are stored for this object. Atlas shows what was observed and when — it does not infer a history.

Connections · 2
Assembled narrative · 1

Assembled from 27 blocks · 2 evidence · 10 related

  1. Story
  2. The Apollo 11 landing site, on the southwestern Mare Tranquillitatis. Eagle set down here on 20 July 1969. The descent stage, the Passive Seismic Experiment package, the Laser Ranging Retroreflector, a United States flag, discarded equipment and the crews' bootprints all remain, imaged from orbit by the Lunar Reconnaissance Orbiter Camera since 2009 — the LROC data give the descent stage's position as 0.67408° N, 23.47297° E in the IAU lunar reference frame. The retroreflector is still ranged by laser from Earth, measuring the Earth–Moon distance to millimetre precision more than half a century later. The site was chosen for flatness, good Lunar Orbiter mapping coverage, an approach path clear of rough terrain, and a low-energy trajectory from an equatorial parking orbit.
  3. Knowledge
  4. Apollo Program
  5. The Moon
  6. Tranquility Base (Apollo 11 landing site)
  7. Connections
  8. Apollo 11
  9. The Moon
  10. Apollo Program
  11. Neil Armstrong
  12. Eagle lands at Tranquility Base
  13. Neil Armstrong becomes the first person to walk on the Moon
  14. Tranquility Base (Apollo 11 landing site)
  15. Apollo 8 enters lunar orbit and photographs Earthrise
  16. Challenger lands in the Taurus–Littrow valley
  17. Eugene Cernan becomes the last person to stand on the Moon
  18. Artemis II rounds the lunar far side and breaks the Apollo 13 distance record
  19. Apollo 1 (AS-204)
  20. Apollo 17
  21. Tranquility Base (Apollo 11 landing site)
  22. Kennedy commits the United States to a crewed lunar landing
  23. Apollo 1 fire kills three astronauts at Launch Complex 34
  24. Eugene Cernan becomes the last person to stand on the Moon
  25. Evidence
  26. Provides the modern position of the Apollo 11 Eagle descent stage and Laser Ranging Retroreflector at 0.67408° N, 23.47297° E, together with imagery of hardware, experiment packages and crew tracks still in place.
  27. Source for Apollo 11 launch, landing, EVA and splashdown times, sample mass returned, and the deployed surface experiment package.
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