rille

(redirected from Rilles)
Also found in: Dictionary, Thesaurus.

rille

(rĭl): see moonmoon,
natural satellite of a planet (see satellite, natural) or dwarf planet, in particular, the single natural satellite of the earth. The Earth-Moon System

The moon is the earth's nearest neighbor in space.
..... Click the link for more information.
.

rille

(ril) (rima) Either of two distinct types of elongated lunar depression (see table). Sinuous rilles are confined to the maria, where they follow local contours, are frequently discontinuous (or consist of rows of coalescing craters), and have V-shaped cross sections. They sometimes originate in volcanic caldera and are assumed to be channels, or collapsed tubes, carved out by molten basaltic lavas. Examples exist of sinuous rilles inside sinuous rilles but tributary systems are not observed.

Faulted linear, arcuate, and forked rilles have flat floors and do not recognize highland-mare boundaries. This second type of rille is frequently associated with impact basins and craters, where they may be concentric. See also crater chain; fault; wrinkle ridges.

rille

[ril]
(astronomy)
References in periodicals archive ?
Hermann Klein's 'discovery' in 1878 of what he took to be a new crater near the Hyginus rille also continued to engage the interest of telescopic observers.
These rilles have no obvious sources or destinations and it is not at all clear they are volcanic.
Linear rilles traversing the summit are also detectable on three further large and low domes located in Grimaldi, near Aristillus, and Kies 2, termed Gr1, Ari1, and K2, which have recently been described.
The resulting tensional stress does not produce the formation of crossing rilles, characteristic for the class In1 dome, for which are inferred higher magma pressure of 18-100MPa.
The most famous is Hadley Rille, where the Apollo 15 spacecraft moon lander came down near," he added.
Given that there is reason to believe the Moon was once considerably closer than it is now and none, on the other hand, to suggest that libration was so suppressed at the time as to counterbalance the consequent huge increase of tidal torques, it seems perfectly natural to suggest that this is the mechanism which unroofed all the lunar rilles.
banded craters, rilles, rays, high-albedo swirls, domes, floor-fractured craters, dark-haloed craters, etc.