asteroids and comets
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Ryugu asteroid: RNA compound, vitamin B3 found in samples collected by Japan’s Hayabusa2 mission
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Asteroid forms a debris cloud after intentional hit from spacecraft
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Green comet will swing by Earth for the first time in 50,000 years
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Asteroid makes one of the closest approaches of Earth
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Opinion: Putin's army without a cause
When Russian President Vladimir Putin ordered the invasion of Ukraine in February, many questioned the commitment of his troops to…
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