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Nicole Granucci, Instructor of Physics, Quinnipiac University

THE TRUTH ABOUT: Why do some planets have moons a physics expert explains why earth has only one moon while other planets have hundreds | History Defined

Some planets, such as Saturn, have more than a hundred moons, while others, such as Venus, have none. NASA/JPL-Caltech/Space Science Institute via AP

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to [email protected].

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