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Curious Kids is a series for children of all ages. Have a question you’d like an expert to answer? Send it to [email protected].

Why is the moon called the moon? Other planets moons have great names, ours is just what it is. — Verity, 16; Will, 15; Keenan, 13; and Anthea, 11, Halifax, N.S.

The origin of the moon’s name is a very interesting story. Humans have been aware of this great white orb in the sky ever since they first roamed the Earth.

The moon’s appearance changes as the months pass. It moves through phases from full moon to new moon, and back again.

Where did the word moon come from?
The Earth has just one moon. It is best known as the moon in the English-speaking world because people in ancient times used the moon to measure the passing of the months.

The word moon can be traced to the word mōna, an Old English word from medieval times. Mōna shares its origins with the Latin words metri, which means to measure, and mensis, which means month.

So, we see that the moon is called the moon because it is used to measure the months.

Galileo’s discovery
So, why do the moons around other planets have names, while ours is just the moon?

When the moon was named, people only knew about our moon. That all changed in 1610 when an Italian astronomer called Galileo Galilei discovered what we now know are the four largest moons of Jupiter.

A statue of Galileo Galilei in Florence, Italy. He was a 16th century Italian scientist who is known as the father of modern astronomy. (Shutterstock)
Other astronomers across Europe discovered five moons around Saturn during the 1600s. These objects became known as moons because they were close to their planets, just as our own moon is close to the Earth.

It’s fair to say that other moons are named after our own moon.

The newly discovered moons were each given beautiful names to identify them among the growing number of planets and moons astronomers were finding in the solar system.

Many of these names came from Greek myths. The four large moons Galilei discovered around Jupiter were named Io, Europa, Ganymede and Callisto.

Astronomers continue to find new moons orbiting planets in our solar system. In October 2019, they announced they had newly discovered 20 moons around Saturn.

Hello, curious kids! Do you have a question you’d like an expert to answer? Ask an adult to send your question to [email protected]. Please tell us your name, age and the city where you live.

And since curiosity has no age limit — adults, let us know what you’re wondering, too. We won’t be able to answer every question, but we will do our best.

I’ll find you a link that shows how older humans used to use the moon to even tell the time of night. Divided into 10 minutes l intervals

Our moon is called Lunar. It was formed when a planetoid collided with Earth during the early stages of the formation of the solar system.

Must be interesting.
Post the link, please!