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Olympia Undae is a vast dune field in the north polar region of the planet Mars. It consists of a broad "sand sea" or erg that partly rings the north polar plateau (Planum Boreum) from about 120° to 240°E longitude and 78° to 83°N latitude. Stretching about 1,100 km (680 mi) across and covering an area of 470,000 km2, Olympia Undae is the largest continuous dune field on Mars. It is similar in size to the Rub' Al Khali in the Arabian Peninsula, the largest active erg on Earth. * * * CRISM spectral signal for gypsum (polyhydrated sulfates) in Olympia Undae dunes. *

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rdf:type
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  • Olympia Undae (ca)
  • Olympia Undae (de)
  • Olympia Undae (es)
  • Olympia Undae (it)
  • Olympia Undae (en)
  • Olympia Undae (pt)
  • 奧林比亞沙丘地 (zh)
rdfs:comment
  • Olympia Undae és un gran territori de dunes sorrenques localitzat a la superfície marciana. Aquest camp de dunes s'hi troba situat proper a la regió polar septentrional del planeta, coneguda com Planum Boreum, i cobreix les longituds compreses entre 100°E i 240°E. El 2006, la sonda Mars Express va detectar en aquests terrenys rics dipòsits d'algeps, el que suggereix que aquesta regió pot haver tingut humitat en algun moment de la seva història. (ca)
  • Olympia Undae es un gran territorio de dunas arenosas localizado en la superficie marciana. Dicho campo de dunas se encuentra ubicado próximo a la región polar septentrional del planeta, conocida como Planum Boreum, y cubre las longitudes comprendidas entre 100°E y 240°E. En 2006, la sonda Mars Express detectó en estos terrenos ricos depósitos de aljez, lo cual sugiere que la región debió estar mojada en algún punto de su historia.​ (es)
  • Olympia Undae ist ein riesiges Dünenfeld in der Nordpolregion des Planeten Mars. Dieser extraterrestrische Erg liegt zwischen 78° und 83° nördlicher Breite und umgürtet von 120° bis 240° Länge die Nordpolebene Planum Boreum. Er ist das größte zusammenhängende Dünenfeld auf dem Mars und wird bis zu 1100 Kilometer breit – vergleichbar in seiner Oberflächenausdehnung von 470000 Quadratkilometern mit der Rub al-Chali auf der arabischen Halbinsel, dem bedeutendsten aktiven Erg der Erde. (de)
  • Le Olympia Undae sono una formazione geologica della superficie di Marte, in prossimità del polo nord del pianeta. (it)
  • Olympia Undae é uma zona arenosa repleta de dunas localizada próximo à região polar de Planum Boreum cobrindo as coordenadas 120° a 240° longitude leste e de 78° a 83° latitude norte. Em 2006 ricos depósitos de gesso foram detectados nessa região pela Mars Express ainda em órbita, sugerindo que essa região possa ter tido umidade em algum ponto de sua história. (pt)
  • Olympia Undae is a vast dune field in the north polar region of the planet Mars. It consists of a broad "sand sea" or erg that partly rings the north polar plateau (Planum Boreum) from about 120° to 240°E longitude and 78° to 83°N latitude. Stretching about 1,100 km (680 mi) across and covering an area of 470,000 km2, Olympia Undae is the largest continuous dune field on Mars. It is similar in size to the Rub' Al Khali in the Arabian Peninsula, the largest active erg on Earth. * * * CRISM spectral signal for gypsum (polyhydrated sulfates) in Olympia Undae dunes. * (en)
  • 奥林匹亚沙丘群（Olympia Undae）是火星北极地区由广袤的“沙海”或沙漠组成的浩瀚沙丘场，它部分环绕着北极高原，覆盖范围约从东经120度至东经240度，北纬78度到北纬83度，东西横跨约1100公里（英里），所占面积达到47万公里2。奥林匹亚沙丘群是火星上最大的连片沙丘，大小与地球上最大的流动沙漠—阿拉伯半岛的鲁卜哈利沙漠相当。 奥林匹亚沙丘群位于非正式命名的北极盆地（Borealis basin）内，该盆地是火星北部低地三座地形盆地中最大的一座。奥林匹亚沙丘群的平均海拔约低于基准面（火星“海”平面）4250米，其位于北纬81.63度、东经169.65度处的地理中心附近坐落了直径19公里的霍胡特拉陨击坑（Jojutla crater），该撞击坑由墨西哥天文学家和科学作家安德烈斯·埃洛伊·马丁内斯·罗哈斯所命名。 “翁达”（Unda），复数为“翁代”（undae）是一条拉丁术语，意思是水，尤其是呈波浪流动之水。国际天文学联合会采用该术语来描述其他行星上“起伏”的沙丘状特征。奥林匹亚沙丘群包含有多种沙丘形态和与风有关的（风积）地貌，包括沙席、横向沙丘、简单新月形沙丘、巨型新月形沙丘和复合型新月形沙垄等，所有这些沙丘形态也都出现在地球上。 * 高分辨率成像科学设备显示的奥林匹亚沙丘群，可看到两种代表不同风向的横向沙丘，奥林匹亚山也被称为北极沙漠。 * * * (zh)
foaf:depiction
  • http://commons.wikimedia.org/wiki/Special:FilePath/Mars_Global_Digital_Dune_Database_MC–1.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/North_Polar_Gypsum_Dunes_in_Olympia_Undae.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Olympia+Undae_HiRise.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Olympia_Undae_Dunes_PIA06848.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Olympia_Undae_Gypsum_PIA10948.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Dunes_in_Olympia_Planum.jpg
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