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  • Our Moon isn't the only moon!

  • No matter where you are on Earth, you can usually look up into the night sky and see

  • the Moon.

  • Our Moon appears so big and bright because it's closer to Earth than any other planet

  • or moon.

  • But, our Moon isn't the only moon out there.

  • That's right!

  • In fact, some planets have a lot of moons.

  • A moon is a natural object that orbits anything larger than itself.

  • Moons come in many shapes and sizes.

  • Our solar system has eight planets and dozens of moons.

  • Almost every planet has 'em.

  • Mercury and Venusthe two planets closest to the Sunhave no moons at all.

  • Earth, on the other hand, has one rocky and rather large Moon.

  • It's about one-quarter the size of Earth.

  • Our Moon is the only other place in our solar system where humans have set foot.

  • What are some of the other interesting moons we know about?

  • Well, Mars has two moons named Phobos and Deimos.

  • They're dark and lumpy and at least 100 times smaller than Earth's moon.

  • Jupiter has more than 70 moons!

  • Several of them have very unusual features.

  • For example, Ganymede is the largest known moon in our solar system.

  • You can actually see it from Earth with just a pair or binoculars.

  • Jupiter's moon Io is covered in volcanos

  • And there is thought to be a giant salt water ocean under the icy surface of Jupiter's

  • moon Europa!

  • NASA is planning a future mission to investigate Europa and its underground ocean.

  • Saturn has more than 80 moons in total.

  • And at least two of those are ocean moons, too!

  • They are called Titan and Enceladus.

  • NASA's Cassini mission discovered that the underground ocean on Enceladus shoots jets

  • of icy particles from cracks in the moon's surface and out into space!

  • Uranus has more than 20 moons.

  • Its larger moons, like this one named Ariel, are thought to be made of half water ice and

  • half rock.

  • Scientists have discovered more than a dozen moons orbiting Neptune.

  • It's largest moon, called Triton, has volcanoes with icy lava flows.

  • Brr!

  • Volcanoes, underground oceans, and icy jetswhat do you think we'll discover on moons next?

  • Find out more about moons at NASA Space Place.

Our Moon isn't the only moon!

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Our Moon Isn't the Only Moon!

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    Sandra posted on 2021/11/02
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