Where would this mysterious Planet X be found? What makes finding a planet so hard? Is Planet X even a planet? 
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<description>Where would this mysterious Planet X be found? What makes finding a planet so hard? Is Planet X even a planet? 

Have you started your FREE TRIAL of Who Smarted?+ for AD FREE listening, an EXTRA episode every week &amp; bonus content? Sign up right in the Apple app, or directly at WhoSmarted.com and find out why more than 1,000 families are LOVING their subscription!

Get official Who Smarted? Merch: tee-shirts, mugs, hoodies and more, at Who Smarted?</description>

Where would this mysterious Planet X be found? What makes finding a planet so hard? Is Planet X even a planet? 

Have you started your FREE TRIAL of Who Smarted?+ for AD FREE listening, an EXTRA episode every week & bonus content? Sign up right in the Apple app, or directly at WhoSmarted.com and find out why more than 1,000 families are LOVING their subscription!

Get official Who Smarted? Merch: tee-shirts, mugs, hoodies and more, at Who Smarted?

Who Smarted? - Educational Podcast for Kids

Do Scientists think there's an undiscovered Planet X?

Do Scientists think there's an undiscovered Planet X?

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