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This oblique view of the Moon's surface was photographed by the Apollo 10 astronauts in May of 1969. Center point coordinates are located at 13 degrees, 3 minutes east longitude and 7 degrees, 1 minute north latitude. One of the Apollo 10 astronauts attached a 250mm lens and aimed a handheld 70mm camera at the surface from lunar orbit for a series of pictures in this area.
Rille (German for 'groove') is typically used to describe any of the long, narrow depressions in the lunar surface that resemble channels. (It is pronounced the same as a secondary name for a river in Normandy in France. See Risle.) Typically a rille can be up to several kilometers wide and hundreds of kilometers in length. However, the term has also been used loosely to describe similar structures on a number of planets in the solar system, including Mars, Venus, and on a number of moons. All bear remarkable structural resemblance to each other.
- Sinuous rilles meander in a curved path like a mature river, and are commonly thought to be the remains of collapsed lava tubes or extinct lava flows. They usually begin at an extinct volcano, then meander and sometimes split as they are followed across the surface. Vallis Schröteri in Oceanus Procellarum is the largest sinuous rille.
- Arcuate rilles have a smooth curve and are found on the edges of the dark lunar maria. They are believed to form when the lava flows that created a mare cool, contract, and sink. This are found all over the moon, examples can be seen near the south-western border of Mare Tranquillitatis and on the south-eastern border of Mare Humorum.
- Straight rilles follow long, linear paths and are believed to be grabens, sections of the crust that have sunk between two parallel faults. These can be readily identified when they pass through craters or mountain ranges. Vallis Alpes is by far the largest graben rille, indeed it is regarded as too large to be called a rille and is itself bisected by a straight rille; Rupes Recta in Mare Nubium is a clearer example.
Originally posted by stevo351
well the first one looks interesting, as you can see the structure complete the shape on the other side. doesnt look natural. but the next two i dont really think is anything special... space tunnels? ha joking. nah i dunno. could be moon hair. or the mystical crevasses from which earth extracts its cheese supply.