Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. It was made over 60 years after Admiral Byrd became the first to fly over the Earth's north pole . Within a superposed frame of lattitude and longitude lines much of the Moon's familiar face , dominated by smooth dark mare , is brightly lit. Near the pole itself, the harsh shadows reveal a rugged, cratered lunarscape .
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