Matches in DBpedia 2016-04 for { <http://wikidata.dbpedia.org/resource/Q21027955> ?p ?o }
- Q21027955 subject Q13328568.
- Q21027955 subject Q8909585.
- Q21027955 abstract "In summer 1965, the first close-up pictures from Mars showed a cratered desert with no signs of water. However, over the decades, as more parts of the planet were imaged with better cameras on more sophisticated satellites, Mars showed evidence of past river valleys, lakes, and ice in glaciers and in the ground. It was discovered that the climate of Mars displays huge changes over geologic time because its axis is not stabilized by a large moon, as Earth is. Also, some researchers maintain that water could exist for periods of time due to geothermal effects or asteroid impacts.Besides seeing features that were signs of past water, researchers found other types of evidence for past water. Minerals detected in many locations needed water to form. An instrument in the Mars Odyssey, an orbiting spacecraft, mapped the distribution of water in the near surface. When the Phoenix spacecraft fired its rockets to land in the far north, ice was exposed.When water enters a large body of water, such as a lake, a delta may form. Many craters and other depressions on Mars show deltas that resemble those on Earth. In addition, if a lake lies in a depression, channels entering it will all stop at the same altitude. Such an arrangement is visible around places on Mars that are supposed to have contained large bodies of water—including around a possible ocean in the North.Lake formation has been proposed by various researchers for quite some time. One study found 205 possible closed-basin lakes in craters on Mars. The basins have an inlet valley that cuts the crater rim and flows into the basin, but they have no visible outlet valley. The total volume of the basins is equivalent to a depth of 1.2 meters spread evenly over Martian surface. However, this amount is a small fraction of the current water ice stores on Mars. Another study found 210 open-basin lakes. These were lakes with both an inlet and an outlet; hence water must have entered the basin, and reached the height of the outlet. Some of these lakes had volumes similar to Earth's Caspian Sea, Black Sea, and Lake Baikal.Moreover, some basins on Mars form part of long chains of lakes. The Naktong/Scamander/Mamers Valles lake-chain system is about 4500 km (2800 miles) long, with a drainage area similar to the Missouri-Mississippi rivers. Another, the Samara/Himera Vallis system is 1800 km long. Many of the long chains of lakes are found in the Margaritifer Sinus quadrangle.Some of the lakes appear to have had a high volume as compared to their drainage area; hence, it is believed that some of the water was groundwater. Further evidence is the existence of knobby material on the basin floors. These knobs can be formed when large amounts of water left the ground.This article describes some of the places that could have held large lakes.".
- Q21027955 diameter "119000.0".
- Q21027955 diameter "49000.0".
- Q21027955 location Q111.
- Q21027955 thumbnail PIA10741_Possible_Ice_Below_Phoenix.jpg?width=300.
- Q21027955 wikiPageExternalLink pia16223-stereoHattah-Mastcam-br2.jpg.
- Q21027955 wikiPageExternalLink PIA16156_fig1.jpg.
- Q21027955 wikiPageExternalLink watch?v=DGBbke1wJRk.
- Q21027955 wikiPageExternalLink watch?v=_sUUKcZaTgA.
- Q21027955 wikiPageExternalLink watch?v=xq65TVKDZXs.
- Q21027955 wikiPageWikiLink Q102296.
- Q21027955 wikiPageWikiLink Q103510.
- Q21027955 wikiPageWikiLink Q1036092.
- Q21027955 wikiPageWikiLink Q1059570.
- Q21027955 wikiPageWikiLink Q1093833.
- Q21027955 wikiPageWikiLink Q1107469.
- Q21027955 wikiPageWikiLink Q1108979.
- Q21027955 wikiPageWikiLink Q111.
- Q21027955 wikiPageWikiLink Q1165200.
- Q21027955 wikiPageWikiLink Q12056539.
- Q21027955 wikiPageWikiLink Q1279811.
- Q21027955 wikiPageWikiLink Q128621.
- Q21027955 wikiPageWikiLink Q129091.
- Q21027955 wikiPageWikiLink Q131800.
- Q21027955 wikiPageWikiLink Q13328568.
- Q21027955 wikiPageWikiLink Q1334481.
- Q21027955 wikiPageWikiLink Q1361400.
- Q21027955 wikiPageWikiLink Q1383.
- Q21027955 wikiPageWikiLink Q1387.
- Q21027955 wikiPageWikiLink Q1429491.
- Q21027955 wikiPageWikiLink Q1502887.
- Q21027955 wikiPageWikiLink Q1526343.
- Q21027955 wikiPageWikiLink Q1530968.
- Q21027955 wikiPageWikiLink Q1570358.
- Q21027955 wikiPageWikiLink Q166.
- Q21027955 wikiPageWikiLink Q172290.
- Q21027955 wikiPageWikiLink Q178977.
- Q21027955 wikiPageWikiLink Q1799034.
- Q21027955 wikiPageWikiLink Q179918.
- Q21027955 wikiPageWikiLink Q180184.
- Q21027955 wikiPageWikiLink Q183160.
- Q21027955 wikiPageWikiLink Q1851937.
- Q21027955 wikiPageWikiLink Q188463.
- Q21027955 wikiPageWikiLink Q191704.
- Q21027955 wikiPageWikiLink Q192701.
- Q21027955 wikiPageWikiLink Q1927126.
- Q21027955 wikiPageWikiLink Q194057.
- Q21027955 wikiPageWikiLink Q19838113.
- Q21027955 wikiPageWikiLink Q1985733.
- Q21027955 wikiPageWikiLink Q203805.
- Q21027955 wikiPageWikiLink Q205672.
- Q21027955 wikiPageWikiLink Q206300.
- Q21027955 wikiPageWikiLink Q207164.
- Q21027955 wikiPageWikiLink Q21027966.
- Q21027955 wikiPageWikiLink Q218860.
- Q21027955 wikiPageWikiLink Q223197.
- Q21027955 wikiPageWikiLink Q23360.
- Q21027955 wikiPageWikiLink Q233708.
- Q21027955 wikiPageWikiLink Q23397.
- Q21027955 wikiPageWikiLink Q2351678.
- Q21027955 wikiPageWikiLink Q23526.
- Q21027955 wikiPageWikiLink Q23548.
- Q21027955 wikiPageWikiLink Q2357969.
- Q21027955 wikiPageWikiLink Q2422217.
- Q21027955 wikiPageWikiLink Q2466.
- Q21027955 wikiPageWikiLink Q2609490.
- Q21027955 wikiPageWikiLink Q2610088.
- Q21027955 wikiPageWikiLink Q3.
- Q21027955 wikiPageWikiLink Q3039434.
- Q21027955 wikiPageWikiLink Q3054518.
- Q21027955 wikiPageWikiLink Q3054539.
- Q21027955 wikiPageWikiLink Q3054559.
- Q21027955 wikiPageWikiLink Q3054565.
- Q21027955 wikiPageWikiLink Q3055638.
- Q21027955 wikiPageWikiLink Q3055646.
- Q21027955 wikiPageWikiLink Q3055653.
- Q21027955 wikiPageWikiLink Q3055669.
- Q21027955 wikiPageWikiLink Q3055681.
- Q21027955 wikiPageWikiLink Q3116689.
- Q21027955 wikiPageWikiLink Q3121532.
- Q21027955 wikiPageWikiLink Q3297988.
- Q21027955 wikiPageWikiLink Q3299463.
- Q21027955 wikiPageWikiLink Q332784.
- Q21027955 wikiPageWikiLink Q3348698.
- Q21027955 wikiPageWikiLink Q338106.
- Q21027955 wikiPageWikiLink Q3497768.
- Q21027955 wikiPageWikiLink Q3518294.
- Q21027955 wikiPageWikiLink Q3693191.
- Q21027955 wikiPageWikiLink Q3773268.
- Q21027955 wikiPageWikiLink Q3811651.
- Q21027955 wikiPageWikiLink Q388053.
- Q21027955 wikiPageWikiLink Q388227.
- Q21027955 wikiPageWikiLink Q391398.
- Q21027955 wikiPageWikiLink Q39833.
- Q21027955 wikiPageWikiLink Q4026824.
- Q21027955 wikiPageWikiLink Q4027242.
- Q21027955 wikiPageWikiLink Q411168.
- Q21027955 wikiPageWikiLink Q411430.