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Khin Mg Thwin
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"All the Water on Planet Earth"
How much of planet Earth is made of water? Very little, actually. Although oceans of water cover about 70 percent of Earth's surface, these oceans are shallow compared to the Earth's radius. The featured illustration shows what would happen if all of the water on or near the surface of the Earth were bunched up into a ball. The radius of this ball would be only about 700 kilometers, less than half the radius of the Earth's Moon, but slightly larger than Saturn's moon Rhea which, like many moons in our outer Solar System, is mostly water ice. How even this much water came to be on the Earth and whether any significant amount is trapped far beneath Earth's surface remain topics of research.

Illustration Credit & Copyright: Jack Cook, Adam Nieman, Woods Hole Oceanographic Institution, Howard Perlman, USGS
Woods Hole Oceanographic Institution: www.whoi.edu
USGS: http://water.usgs.gov/
Release Date: September 11, 2016

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Nice landing
Expedition 48 Soyuz TMA-20M Landing in Kazakhstan
The Soyuz TMA-20M spacecraft is seen as it lands with Expedition 48 crew members NASA astronaut Jeff Williams, Russian cosmonauts Alexey Ovchinin, and Oleg Skripochka of Roscosmos near the town of Zhezkazgan, Kazakhstan on Wednesday, Sept. 7, 2016 (Kazakh time). Williams, Ovchinin, and Skripochka are returning after 172 days in space where they served as members of the Expedition 47 and 48 crews onboard the International Space Station.

Credit: NASA/Bill Ingalls
Image Date: September 7, 2016

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Expedition 48 Soyuz Landing
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