Space
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Solar flares from 80,000-mile wide sunspot threatens Earth
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Massive black holes spew particles preventing new star formation
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Here's how to safely watch partial solar eclipse on Thursday, Oct. 23.
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Saturn’s moon Titan glows, awing NASA
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Largest sunspot in past 20 years turns towards Earth
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How do ISS astronauts maintain their health?
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Rotten eggs in space? That’s what comets smell like
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How black holes can stop stars from forming
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UFO spotted in NASA video of ISS repair: Real or fake? [Video]
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Cosmic radiation makes Mars dangerous for humans
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Two families, hundreds of comets: ‘Exocomets’ found circling distant star
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It's a Mars rehearsal: Team studies isolation effects under dome in Hawaii
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