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Sebastian Lletget USA Jersey

Sebastian Lletget USA Jersey

Berichtdoor gsnoopy520 » 18 mei 2018, 09:07

WASHINGTON Jerian Grant Jersey , May 12 (Xinhua) -- Mysterious dark material on the surface of Jupiter's moon Europa is likely sea salt from a subsurface ocean, darkened by exposure to radiation, researchers from the U.S. space agency NASA suggested Tuesday.


For more than a decade, scientists have wondered about the nature of the dark material that coats long, linear fractures and other relatively young geological features on Europa's surface.


Its association with young terrains suggests the material has erupted from within Europa Denzel Valentine Jersey , but with limited data available, the material's chemical composition has remained elusive.


To identify the dark material, researchers at NASA's Jet Propulsion Laboratory created a lab setup that mimics conditions on Europa's surface in terms of temperature, pressure and radiation exposure.


For this study, the researchers tested samples of common salt -- sodium chloride -- along with mixtures of salt and water Dennis Rodman Jersey , in their vacuum chamber in accordance with Europa's chilly surface temperature of minus 280 degrees Fahrenheit (minus 173 degrees Celsius).


They then bombarded the salty samples with an electron beam to simulate the intense radiation on the moon's surface.


After several days of exposure to this harsh environment, which corresponds to as long as a century on Europa, the salt samples' color turned from white to yellowish-brown, which is similar to features on the icy moon.


Additionally, the longer the samples were exposed to radiation Cameron Payne Jersey , the darker the resulting color, they found.


"The presence of sea salt on Europa's surface suggests the ocean is interacting with its rocky seafloor -- an important consideration in determining whether the icy moon could support life," NASA said in a statement.


The study was published online in the U.S. journal Geophysical Research Letters.


ZHENGZHOU, Sept. 23 (Xinhua) -- An archaeology report was published Saturday, 20 years after the first joint field archaeological excavation between China and the United States that ended in 1997.


The program Bobby Portis Jersey , Investigations into Early Shang Civilization, was the first Sino-foreign collaborative archaeological field program approved by China's cultural heritage authorities since 1949, according to the Yudong Archaeology Report.


The excavation was carried out between 1994 and 1997 by the Chinese Academy of Social Sciences Institute of Archaeology and Harvard University.


It aimed to trace the origin of the Shang Dynasty (1600-1046 B.C.) in Shangqiu city of central China's Henan Province. Shangqiu is believed to be the capital of pre-Shang and early Shang dynasties.


Although the joint excavation did not find hard proof of the Shang Dynasty, it discovered the relics of Kingdom Song (1114-286 B.C.), laying a solid foundation for future exploration of the Shang.


"It opened a new chapter in opportunities for Sino-foreign archeology research Chicago Bulls Hats ," said Robert Murowchick, a member of the joint team who currently serves as director of the International Center for East Asian Archaeology and Cultural History at Boston University.


Murowchick said there had been 20 Sino-U.S. programs in the past 15 to 20 years that he knew of.


This project traces the origins of the Shang civilization through an interdisciplinary program of geological testing and landscape reconstruction, geophysical remote sensing, and archaeological excavation, which was a new approach at the time Chicago Bulls T-Shirts , said Tang Jigen, a member of the team.


Murowchick told Xinhua that they did not dig further due to technology and funding constraints as the water table was only 15 feet below the surface.


"I think it can restart now. We have money. New technology is available. We know the site it was probably located, and we have a much smaller area to focus on," he said.


Dutch official calls on more businesses to get on board China Railway Express to Europe


Interview: Aung San Suu Kyi stresses curbing violence without use of excessive force in Rakhine state


China's bike-sharing company ofo to increase bikes in London


Chinese, Pakistani air forces conduct joint drill


Autumn scenery of Kanas scenic area in NW China's Xinjiang


Chinese Chicago Bulls Hoodie , Pakistani air forces conduct joint drill


Paddy cultivation area in China's Yanbian surpasses 46,000 hectares


China Focus: Beijing-Shanghai railway speed rises to 350 kph

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