NASA : Fingerprints of Water on the Sand .- Las huellas dactilares de agua en la arena

Hola amigos: A VUELO DE UN QUINDE EL BLOG.,  Kjell Lindgren, Astronauta de la NASA tomó esta fotografía el 11 de noviembre, 2015, desde la Estación Espacial Internacional, y lo compartió con sus seguidores en las redes sociales. Lindgren escribió: "Las delicadas huellas de agua impresas en la arena. El #StoryOfWater." El área fotografiada se encuentra en Omán, a unos 20 km al oeste-noroeste de Hamra Al Drooa.

More information.......

http://www.nasa.gov/image-feature/fingerprints-of-water-on-the-sand

NASA astronaut Kjell Lindgren took this photograph on Nov. 11, 2015 from the International Space Station, and shared it with his followers on social media. Lindgren wrote, "The delicate fingerprints of water imprinted on the sand. The #StoryOfWater." The area photographed is located in Oman, approximately 20 km to the west-northwest of Hamra Al Drooa.

One of the ways research on the space station benefits life on Earth is by supporting water purification efforts worldwide. Drinkable water is vital for human survival. Unfortunately, many people around the world lack access to clean water. Using technology developed for the space station, at-risk areas can gain access to advanced water filtration and purification systems, making a life-saving difference in these communities. Joint collaborations between aid organizations and NASA technology show just how effectively space research can adapt to contribute answers to global problems. The commercialization of this station-related technology has provided aid and disaster relief for communities worldwide.

Image Credit: NASA

Last Updated: Nov. 17, 2015

Editor: Sarah Loff

Tags:  Earth, Expedition 45, Image of the Day, International Space Station (ISS), Water,

NASA

Guillermo Gonzalo Sánchez Achutegui

ayabaca@gmail.com

ayabaca@hotmail.com

ayabaca@yahoo.com

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NASA : Cloud Bands Over the Western Sahara Desert, Mauritania

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Cloud Bands Over the Western Sahara Desert, Mauritania

This photograph of cloud bands over southern Mauritania was taken from the International Space Station with an oblique angle such that the cloud shadows are a prominent part of the view. Beneath the clouds, the plateau of dark sedimentary rocks appears as a ragged, near-vertical escarpment (image top right). Isolated remnants of the plateau appear as dark mesas (flat-topped hills) across the top and near the center of the image. The escarpment is about 250 meters high, with a field of orange-colored dunes at the base (image upper right).

Prevailing winds in this part of the Sahara Desert blow from the northeast. (Note that north is to the right.) The wavy dunes are aligned transverse (roughly right angles) to these winds. The sand that makes the dunes is blown in from a zone immediately upwind (just out of the bottom of the image), where dry river beds and dry lakes provide large quantities of mobile sand. This pattern is typical in the western Sahara Desert, where plateau surfaces are mostly dune free and dune fields are located in the surrounding lowlands. Larger rivers deposit sandy sediment on the few occasions when they flow, sometimes only once in decades.

Astronaut photograph ISS038-E-26862 was acquired on Jan. 8, 2014, with a Nikon D3S digital camera using a 180 millimeter lens, and is provided by the ISS Crew Earth Observations experiment and Image Science & Analysis Laboratory, Johnson Space Center. The image was taken by the Expedition 38 crew. It has been cropped and enhanced to improve contrast, and lens artifacts have been removed.

> View annotated image

Image Credit: NASA
Caption: M. Justin Wilkinson, Jacobs at NASA-JSC

NASA
Guillermo Gonzalo Sánchez Achutegui
ayabaca@gmail.com
ayabaca@hotmail.com
ayabaca@yahoo.com
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