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Rocknest is a sand patch on the surface of Aeolis Palus, between Peace Vallis and Aeolis Mons ("Mount Sharp"), in Gale crater on the planet Mars. The patch was encountered by the Curiosity rover on the way from Bradbury Landing to Glenelg Intrigue on September 28, 2012. The "approximate" site coordinates are: . The sand patch is downhill from a cluster of dark rocks. NASA determined the patch to be the location for the first use of the scoop on the arm of the Mars ''Curiosity rover''. The ''"Rocknest"'' patch is about by . On October 7, 2012, a mysterious "bright object" (image), discovered in the sand at ''Rocknest'', drew scientific interest. Several close-up pictures ((close-up 1 )) ((close-up 2 )) were taken of the object and preliminary interpretations by scientists suggest the object to be "debris from the spacecraft". Nonetheless, further images in the nearby sand have detected other "bright particles" ((image )) ((close-up 1 )). These newly discovered objects are presently thought to be "native Martian material".〔 On October 17, 2012 at "Rocknest", the first X-ray diffraction analysis of Martian soil was performed. The results from the rover's CheMin analyzer revealed the presence of several minerals, including feldspar, pyroxenes and olivine, and suggested that the Martian soil in the sample was similar to the "weathered basaltic soils" of Hawaiian volcanoes. On September 26, 2013, NASA scientists reported the Mars Curiosity rover detected "abundant, easily accessible" water (1.5 to 3 weight percent) in soil samples at the Rocknest region of Aeolis Palus in Gale Crater. In addition, NASA reported the rover found two principal soil types: a fine-grained mafic type and a locally derived, coarse-grained felsic type.〔〔 The mafic type, similar to other martian soils and martian dust, was associated with hydration of the amorphous phases of the soil.〔 Also, perchlorates, the presence of which may make detection of life-related organic molecules difficult, were found at the Curiosity rover landing site (and earlier at the more polar site of the Phoenix lander) suggesting a "global distribution of these salts".〔 NASA also reported that Jake M rock, a rock encountered by ''Curiosity'' on the way to Glenelg, was a mugearite and very similar to terrestrial mugearite rocks. == Images == Image:PIA16239 High-Resolution Self-Portrait by Curiosity Rover Arm Camera unedited.jpg|Curiosity rover self-portrait on the planet Mars at ''"Rocknest"'' (October 31, 2012). Image:Wheel Scuff Mark at 'Rocknest'.JPG|Curiosity rover wheel marks in the sand patch at the ''"Rocknest"'' site (October 3, 2012). Image:PIA16193-MarsCuriosityRover-ScoffmarkInSand-2011004.jpg|Sand on Mars - scoffmark made by the Curiosity rover (MAHLI, October 4, 2012). Image:PIA16225-MarsCuriosityRover-ScooperTest-20121008.jpg|First use of the Curiosity rover scooper as it sifts a load of sand at ''"Rocknest"'' (October 7, 2012). Image:PIA16225-MarsCuriosityRover-ScooperTest&MysteryObject-20121008a.jpg|''Curiosity'' finds a ''"bright object"'' in the sand at ''"Rocknest"'' (October 7, 2012)〔 ((close-up )). Image:PIA16226-MarsCuriosityRover-FirstScoopOfSoil-20121007.jpg|First use of the Curiosity rover scooper as it sifts a load of sand at ''"Rocknest"'' (October 7, 2012). Image:PIA16231-MarsCuriosityRover-Tray-20121015.jpg|Curiosity rover scoop "bite marks" in the sand patch at the ''"Rocknest"'' site (October 15, 2012). Image:PIA16232-MarsCuriosityRover-Tray-20121016.jpg|Curiosity rover scoop "soil sample" on "observation tray" at the ''"Rocknest"'' site (October 16, 2012). Image:PIA16174-MarsCuriosityRover-Sand-Rocknest-20121030.jpg|Sand at ''"Rocknest"'' used for the first X-ray analysis of Martian soil (Curiosity rover, October 30, 2012)〔 Image:PIA16217-MarsCuriosityRover-1stXRayView-20121017.jpg|First X-ray view of Martian soil (Curiosity rover at ''"Rocknest"'', October 17, 2012).〔 Image:PIA16452-MarsCuriosityRover-Rocknest3Rock-20121005.jpg|"Rocknest 3" rock - ChemCam and APSX target (Curiosity rover, October 5, 2012) (white-balanced image). Image:PIA16451-MarsCuriosityRover-Rocknest3Rock-RMI-20121003.jpg|"Rocknest 3" rock - ChemCam and APSX target (Curiosity rover, October 3, 2012). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rocknest (Mars)」の詳細全文を読む スポンサード リンク
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