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Astronomers Detect Surprising Cosmic Collision Near Black Hole | Using a series of radio telescopes, a group of astronomers has discovered a cosmic collision taking place 450 million light-years away in a galaxy near the constellation Orion. The collision involves a streaming plasma jet and an interstellar cloud of gas and dust. | |
Earth's Offspring? The Collision Theory | In the decades since Apollo astronauts collected moon rocks, one theory has emerged over competing explanations of lunar birth: the moon formed when a big object whacked Earth. | | | | |
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