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How did Earth get such a strange moon? Exploring the giant impact theoryThe leading explanation for all of these mysteries is known as the giant impact hypothesis. According to this story, when the ...
NASA astronaut Sunita Williams returns to Earth after a nine-month mission aboard the ISS. Following her splashdown, she ...
While Venus passes between the Earth and Sun every 19.5 months, it's only about every eight or so years that the planet becomes visible both after sunset and before sunrise, according to the ...
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