Category: tumblr

• Looking east to west across the rim and down into Chaplygin crater reveals this beautiful example of a fresh young crater and its perfectly preserved ejecta blanket. The delicate patterns of flow across, over, and down local topography clearly show that ejecta traveled as a ground hugging flow for great distances, rather than simply being tossed out on a ballistic trajectory. Very near the rim lies a dark, lacy, discontinuous crust of now frozen impact melt. Clearly this dark material is on top of the bright material so it was the very last material ejected from the crater. The melt was formed as the tremendous energy of impact was converted to heat and the lunar crust was melted at the impact point. As the crater rebounded and material sloughed down the walls of the deforming crater the melt was splashed out over the rim and froze. Its low reflectance is mostly due to a high percentage of glass because the melt cooled so quickly that minerals did not have time to crystallize. The fact that the delicate splash patterns are so well preserved testifies to the very young age of this crater. But how young? For comparison “Chappy” (informal name) is 200 m larger than Meteor crater (1200 m diameter) in Arizona, which is about 50,000 years old. Craters of this size form every 100,000 years or so on the Moon and the Earth. Since there are very few superposed craters on Chappy, and its ejecta is so perfectly preserved it may be much younger than Meteor crater. However, we can’t know the true true absolute age of “Chappy” until we can obtain a sample of its impact melt for radiometric age dating. Investigate all of Chappy’s ejecta, at full resolution: http://bit.ly/1V69ZAN Credit: NASA/Goddard/Arizona State University/LRO/LROC by nasagoddard

  2016-03-30

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• Meow irl via /r/MEOW_IRL http://bit.ly/1omznFu

  2016-03-30

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• Leo Triplet js http://bit.ly/1omyD33

  2016-03-30

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• Images From Offworld (31 photos) http://theatln.tc/1VTNlw7

  2016-03-30

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• [OC] Moonlit Tunnel View with Star Trails by Matt Andersen [2000×1333] via /r/SkyPorn http://bit.ly/1RLfuza

  2016-03-30

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• The Rocky Mountains taken from a Cessna 182 near Canmore, Alberta, Canada [4608 x 3456px] [OC] via /r/EarthPorn http://bit.ly/1qjARSl

  2016-03-30

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• Meow_irl via /r/MEOW_IRL http://bit.ly/1qjyvmG

  2016-03-30

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• Snowdonia, North Wales [OC] [4160×2340] via /r/EarthPorn http://bit.ly/1SxIiP9

  2016-03-30

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• Kate Bush – Running Up That Hill – Official Music Video http://youtu.be/wp43OdtAAkM

  2016-03-30

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  via Interdisciplinary Postmodern Liberal Democratic Salon Peace Love Beauty Wisdom Balance Understanding Imagination Consciousness Bliss

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• Sunset with Lenticular cloud in the Patagonia region, Torres Del Paine National Park, Chile | by JKboy Jatenipat. [2400×1604] via /r/EarthPorn http://bit.ly/1pKVxlN

  2016-03-30

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• Saskatchewan – Land of the Living Skies , YQR International Airport [OC] [1131 x 636] via /r/SkyPorn http://bit.ly/1V5CDls

  2016-03-30

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• Light Pillars over Alaska : What’s happening behind those… http://bit.ly/1Sn5zk5

  2016-03-30

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• Earth Art in Northwestern Australia via NASA http://go.nasa.gov/1RL0r8M

  2016-03-30

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• David Bowie – Life On Mars? http://youtu.be/v–IqqusnNQ

  2016-03-30

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