Explore the universe and discover our home planet with the official NASA page on Facebook. Visit us. Posts. About. Photos. ... <看更多>
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Explore the universe and discover our home planet with the official NASA page on Facebook. Visit us. Posts. About. Photos. ... <看更多>
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Breathtaking NASA images of the Earth seen from Space. Image: Frank Borman & James A. Lovell The Earth is a truly beautiful and fascinating place – even ... ... <看更多>