Pluto’s moons a big surprise!

Most inner moons in the solar system keep one face pointed toward their central planet. This is claimed to have resulted from a gravitational tidal locking effect that is evidence for the very old age of the solar system (allegedly about 5 billion years). Due to the fact that the moons are not point objects, gravitational theory tells usĀ ‘tidal friction’ causes the moons to eventually tidally lock to their respective planets after a long period of time, thus leaving one face of the moon always pointed at the parent planet. Therefore the moons rotate on their axis once per revolution around their parent planet.

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Credit: NASA/JHUAPL/SwRI/Mark Showalter

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