rille


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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.
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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.

Collins Dictionary of Astronomy © Market House Books Ltd, 2006

rille

[ril]
(astronomy)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
While observing the seven-day-old Moon recently, I found it especially difficult to detect the K-shaped pattern of rilles east of Triesnecker Crater.
In fact, the vents of most sinuous rilles are depressions, as if the eruption caused the roof to collapse as the source magma chamber was emptied to form the rilles.
Wood's question about what size scope can show the Triesnecker rilles is answered in Wilkins and Moore's 1955 classic The Moon, where they state that the main members appear in a good 3-inch refractor.
On another outing they drove to the 1.5-km-wide, relatively steep-sided Hadley Rille. The rille was formed by rapidly moving lava flows that built up levees along its 80-km length.
The lawsuit was originally filed in the Eastern District of Arkansas by Norman Rille and Neal Roberts under whistleblower provisions of the federal False Claims Act.
As a title in the Archaelogy Series from Hadley Rille Books, Mayflies was created to be an "archaeologically-accurate novel ...
In 2007, IBM and PricewaterhouseCoopers agreed to pay a total of $5.2 million to settle allegations around the same case, which was originally filed by whistleblowers Norman Rille and Neal Roberts.
IT company HP (NYSE: HPQ) today announced that it has reached a settlement with the US Department of Justice which will resolve and investigation into HP's GSA Multiple Award Schedule contract as well as separate allegations associated with the Rille complaint files in the US District Court in the Eastern District of Arkansas in 2007.
They collected 169 lbs (76.8kg) of moon rock from 12 different sites including Hadley Rille, an ancient channel believed to have been carved by torrents of flowing lava.
And Apollo 15 landed near a vast chasm in the lunar surface, Hadley Rille.