Carl Sagan: One Scientist, One Imagination, One Dot

Today is the 25th anniversary of the Pale Blue Dot, one of the most famous images of our planet. Carl Sagan convinced NASA to turn the camera of Voyager I toward Earth during its long exit from our solar system. Barely visible from six billion kilometers, the low-tech rendition of our home is almost lost in the spectrum of rays produced by the sun. But the .12 pixel image is an enduring reflection on science and imagination.

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NASA's SMAP REmote Sensing Satellite Will Produce Global Maps of Soil Moisture

An orbiting observatory that measures the amount of water in the top 5 cm (2 inches) of soil everywhere on Earth’s surface will soon be placed in a polar orbit around Earth. It is called SMAP. SMAP stands for Soil Moisture Active and Passive. SMAP will produce global maps of soil moisture. Scientists will use these to help improve our understanding of how water and carbon (in its various forms) circulate.

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