Sea of Tranquility
Apollo landing site
The Sea of Tranquility is a dark, flat plain on the Moon's surface, visible from Earth as one of the darker patches on the lunar face.
Like other lunar "seas" (maria), it contains no water—early astronomers mistook these basalt plains for bodies of water.
The site gained fame as the Apollo 11 landing location in 1969, where humans first walked on the Moon.
First manned lunar landing
- Neil ArmstrongFirst person on moon
- lunar moduleSpacecraft for surface landings
- EagleProper name or brand
- moonwalkBackward-gliding dance step
Buzz Aldrin · first steps · bootprint · flag planting · splashdown · Saturn V · mission control · space suit
Undisturbed mental quietude
- stillnessComplete lack of motion
- calmFree from agitation
- quietudeState of calm stillness
- peaceFreedom from disturbance
silence · airless · timeless · desolation · untouched · pristine · eternal · vacuum
Fragmented covering over bedrock
- brecciaCemented angular rock fragments
- lava flowsMoving volcanic rock
- iron-richHigh iron content
- flat terrainLevel, even ground
Side closest to curb
- TheophilusGreek name, God-friend
- equatorial regionArea around Earth's midline
- landing siteDesignated arrival location
- crater rimBoundary of circular depression
Apollo 11
First manned lunar landing
- Neil ArmstrongFirst person on moon
- lunar moduleSpacecraft for surface landings
- EagleProper name or brand
Buzz Aldrin · moonwalk · first steps · bootprint · flag planting · splashdown · Saturn V · mission control · space suit · lunar samples
serenity
Undisturbed mental quietude
peace · silence · airless · timeless · desolation · untouched · pristine · eternal · vacuum · isolation
regolith
Fragmented covering over bedrock
- brecciaCemented angular rock fragments
- lava flowsMoving volcanic rock
- iron-richHigh iron content
nearside
Side closest to curb
- TheophilusGreek name, God-friend
- equatorial regionArea around Earth's midline
- landing siteDesignated arrival location
- Lunar Seas
- Space LandmarksOlympus Mons, Great Red Spot, Valhalla, Cassini Division, Tycho
- moonfull moon, lunar, crescent moon, new moon, half moon
- lunar featurescrater, mare, maria, rille, mons
- space sitesCape Canaveral, Kennedy Space Center, ISS, International Space Station
- spaceflightlaunch, astronaut, spacecraft, liftoff, orbit