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SlideshowReport

Details of a Lunar Mare

Description
(a) Close-up views of the lunar surface reveal rilles and numerous small craters on the maria.
Astronauts in lunar orbit took this photograph of Mare Tranquillitatis (Sea of Tranquility) in 1969
while searching for potential landing sites for the first human landing. At 1100 km (700 mi) across,
this mare is the same size as the distance from London to Rome or Chicago to Philadelphia.
(b) Astronaut David Scott on Hadley’s rille during the Apollo 15 mission to the
Moon.
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