Just by determining how circular a given crater is – using pi and the crater’s perimeter and area – planetary geologists can reveal clues about how the crater was formed and the surface that was impacted. via NASA http://ift.tt/2IncexY
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A Light in the Dark
A sliver of the edge of Earth is brightly illuminated against the vast darkness of space. via NASA https://ift.tt/9XKxIE2
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Astronaut Bruce McCandless II approaches his maximum distance from the Earth-orbiting Space Shuttle Challenger in this 70mm frame photograp...
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An astronaut aboard the International Space Station took this oblique photograph of the Sulaiman Mountains in central Pakistan. The range r...
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This image of Jupiter’s iconic Great Red Spot and surrounding turbulent zones was captured by NASA’s Juno spacecraft. The color-enhanced im...
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