Scientists explain why an interstellar comet sped up in our solar system. (Hint: It wasn't aliens)

(CNN) — In 2017, ‘Oumuamua became the first observed interstellar object to zip through our solar system, and its appearance sparked questions scientists are still trying to answer. The object, similar in shape to a cigar or a pancake, was the size of an asteroid and moved in a somewhat cometlike way but lacked a […]

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