Sea of Tranquility (Mare Tranquillitatis) - The Landing Site of Apollo 11

Look positively hope you enjoy the read and appreciate the efforts put in collecting the data.

I know I am dumb and I am not ashamed to say that.


Mare Tranquillitatis (Sea of Tranquility)
00.67408 °N latitude, 23.47297 °E longitude

For the first lunar landing, Mare Tranquilitatis was the site chosen because it is a relatively smooth and level area. It does, however, have a high density of craters and in the last seconds before landing, the LM had to be manually piloted by Neil Armstrong to avoid a sharp-rimmed ray crater measuring some 180 meters across and 30 meters deep known as West. The LM landed safely some 6 km from the originally intended landing site.

The Apollo 11 LM landed approximately 400 meters west of West crater and 20km south-southwest of the crater Sabine D in the southwestern part of Mare Tranquilitatis. The lunar surface at the landing site consisted of fragmental debris ranging in size from fine particles to blocks about 0.8 meter wide.

The landing site is 41.5 km north-northeast of the western promontory of the Kant Plateau, which is the nearest highland region. The Surveyor 5 spacecraft is approximately 25 km north-northwest of the Apollo 11 landing site, and the impact crater formed by Ranger 8 is 69 km northeast of the landing site.

From Apollo 11 Preliminary Science Report.

Apollo 11 Landing Site 40 Years Later:

Images captured by the Lunar Reconnaissance Orbiter Camera (LROC) between July 11 and 15, 2009 show high-resolution views of the Apollo landing sites. Below is the Apollo 11 landing site with the descent stage of the Lunar Module and its shadow indicated by the arrow.


Image credit: NASA/Goddard Space Flight Center/Arizona State University


Lunar Landing SitesAdapted from the NASA National Space Science Data Center Lunar Exporation Timeline.

Soviet Luna ProbesThe Luna series of unmanned probes (often called "Lunik" in the West during the early years) included the first to fly by the Moon and photograph the far-side, the first to impact the Moon, the first to soft land and return photographs, the first unmanned sample return (which occurred, however, after the manned Apollo 11 and Apollo 12 had already returned far more lunar samples), and the first to deploy a remotely-controlled rover. Only missions which impacted or soft landed are listed below.

Luna 2
Launched 12 Sep 1959
Impacted Moon 13 Sep 1959 at 22:02:04 UT
Latitude 29.10 N, Longitude 0.00 - Palus Putredinis
Luna 9
Launched 31 Jan 1966
Landed on Moon 03 Feb 1966 at 18:44:52 UT
Latitude 7.08 N, Longitude 64.37 W - Oceanus Procellarum
Luna 13
Launched 21 Dec 1966
Landed on Moon 24 Dec 1966 at 18:01:00 UT
Latitude 18.87 N, 62.05 W - Oceanus Procellarum

Luna 16
Launched 12 Sep 1970
Landed on Moon 20 Sep 1970 at 05:18:00 UT
Latitude 0.68 S, Longitude 56.30 E - Mare Fecunditatis
Lunar Sample Return

Luna 17
Launched 10 Nov 1970
Landed on Moon 17 Nov 1970 at 03:47:00 UT
Latitude 38.28 N, Longitude 35.00 W - Mare Imbrium
Lunar Rover - Lunokhod 1
Luna 20
Launched 14 Feb 1972
Landed on Moon 21 Feb 1972 at 19:19:00 UT
Latitude 3.57 N, Longitude 56.50 E - Mare Fecunditatis
Lunar Sample Return to Earth 25 Feb 1972

Luna 21
Launched 08 Jan 1973
Landed on Moon 15 Jan 1973 at 23:35:00 UT
Latitude 25.51 N, Longitude 30.38 E - Mare Serenitatis
Lunar Rover - Lunokhod 2
Luna 24
Launched 14 Aug 1976
Landed on Moon 18 Aug 1976 at 02:00:00 UT
Latitude 12.25 N, Longitude 62.20 E - Mare Crisium
Lunar Sample Return
U.S. Ranger Probes
The Ranger series included both probes which impacted the Moon at high velocity, returning images with increasing resolution up to the moment of impact, and "hard landers" which fired a braking motor at the last moment, dropping an instrument package protected by a balsa wood spherical shock absorber. The early Ranger missions were plagued by problems; the first successful mission was Ranger 7 in 1964. None of the hard landers succeeded; the three successful missions were all imaging impact probes. Ranger 8 flew a direct-in trajectory toward Mare Tranquillitatis, the Sea of Tranquility, providing the first close-up views which indicated the surface was smooth enough for the Apollo Lunar Module to land there.

Ranger 7
Launched 28 July 1964
Impacted Moon 31 July 1964 at 13:25:49 UT
Latitude 10.35 S, Longitude 20.58 W - Mare Cognitum (Sea of Clouds)
Ranger 8
Launched 17 February 1965
Impacted Moon 20 February 1965 at 09:57:37 UT
Latitude 2.67 N, Longitude 24.65 E - Mare Tranquillitatis (Sea of Tranquility)
Ranger 9
Launched 21 March 1965
Impacted Moon 24 March 1965 at 14:08:20 UT
Latitude 12.83 S, Longitude 2.37 W - Alphonsus

U.S. Surveyor Landers
The Surveyor soft landers proved the lunar surface was sufficiently flat and strong to allow the Apollo Lunar Module to land. (Prior to the soft landings by Luna 9 and Surveyor 1 in 1966, some believed the Moon to be covered by a deep sea of dust, into which any lander would sink, never to be seen again.) Surveyor probes were equipped with steerable cameras which provided paranoramic views of their landing sites. Later Surveyors carried a robotic scoop which could excavate soil, move rocks, and deposit soil into instruments for analysis, which provided the first on-site data about its composition.
Surveyor 1
Launched 30 May 1966
Landed 02 June 1966, 06:17:37 UT
Latitude 2.45 S, Longitude 43.21 W - Flamsteed P
Surveyor 2
Launched 20 September 1966
Crashed on Moon 22 September 1966
Vernier engine failed to ignite - southeast of Copernicus Crater
Surveyor 3
Launched 17 April 1967
Landed 20 April 1967, 00:04:53 UT
Latitude 2.94 S, Longitude 23.34 W - Oceanus Procellarum (Ocean of Storms)
Surveyor 4
Launched 14 July 1967
Radio contact lost 17 July 1967
2.5 minutes from touchdown - Sinus Medii
Surveyor 5
Launched 08 September 1967
Landed 11 September 1967, 00:46:44 UT
Latitude 1.41 N, Longitude 23.18 E - Mare Tranquillitatus (Sea of Tranquility)
Surveyor 6
Launched 07 November 1967
Landed 10 November 1967, 01:01:06 UT
Latitude 0.46 N, Longitude 1.37 W - Sinus Medii
Surveyor 7
Launched 07 January 1968
Landed 10 January 1968, 01:05:36 UT
Latitude 41.01 S, Longitude 11.41 W - Tycho North Rim
U.S. Apollo Manned Lunar Landings
The Apollo manned lunar landings returned more than 380 kilograms of samples from a variety of lunar terrain and emplaced instrument packages which performed measurements long after the astronauts had left. Seismometers allowed studying the lunar interior, both from response to natural moonquakes and impacts when spent S-IVB stages that boosted Apollo to the Moon and Lunar Modules (after the astronauts had departed, of course!) were deliberately crashed into the Moon. Laser retroreflectors left by Apollo missions remain in use today, providing data for research in topics ranging from dynamics of the Earth/Moon system to tests of general relativity.
Apollo 11
Launched 16 July 1969
Landed 20 July 1969
Latitude 0.67 N, Longitude 23.49 E - Mare Tranquillitatis
Apollo 12
Launched 14 November 1969
Landed 19 November 1969
Latitude 2.94 S, Longitude 23.45 W - Oceanus Procellarum
Apollo 12 landed within walking distance of Surveyor 3, and astronauts returned pieces of that probe allowing study of long-term exposure to the lunar environment.
Apollo 14
Launched 31 January 1971
Landed 05 February 1971
Latitude 3.67 S, Longitude 17.46 W - Fra Mauro
Apollo 15
Launched 26 July 1971
Landed 30 July 1971
Latitude 26.11 N, Longitude 3.66 E - Hadley Rille
Apollo 16
Launched 16 April 1972
Landed 20 April 1972
Latitude 8.60 S, Longitude 15.31 E - Descartes
Apollo 17
Launched 07 December 1972
Landed 11 December 1972
Latitude 20.17 N, Longitude 30.80 E - Taurus-Littrow




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