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It鈥檚 the Earth鈥檚 only satellite, and it鈥檚 intrigued and confused people on our planet for millennia.

It鈥檚 (probably) safe to say the Moon isn鈥檛 made of cheese, but does it affect our sanity? Is it getting closer to us? Does it really have a dark side?

We鈥檝e taken some myths and legends about the moon and debunked them for you.

Crater 308 on the moon's surfaceImage source, NASA
Image caption,
It doesn't look so much like a person up close, does it?

Is there a man in the moon?

Have you ever thought when you look at the Moon, that it鈥檚 looked back at you? Don鈥檛 worry, you鈥檙e not going round the bend - lots of people do, and it鈥檚 been called 鈥渢he man in the Moon鈥.

It鈥檚 not just a person though. All over the world, people see different things on the rocky surface: a rabbit, a pair of hands, even a toad. So why do such a strange collection of creatures call the moon home?

Well of course we know they don't. The moon has a number of craters on its surface, and different ones can be seen from different parts of Earth. These shapes can create pictures in our minds, as we fill in the blanks and decide that it looks most similar to something familiar to us. This process is called pareidolia - it鈥檚 why Jesus is found on slices of toast so often.

Crater 308 on the moon's surfaceImage source, NASA
Image caption,
It doesn't look so much like a person up close, does it?

Is the moon made of cheese?

You may have first heard this when you watched Wallace and Gromit as a kid, but this fable actually started long before the Wensleydale-loving duo brought it to the big screen.

The myth is thought to originally have come from religious folklore, but the phrase 鈥榯he moone is made o greene cheese鈥 can be found written in the Proverbs of John Heywood (where he also coins famous phrases such as the more, the merrier) in 1546. It鈥檚 used nowadays as a way of expressing something that鈥檚 beyond fantastical, something that no one will ever believe.

NASA is even in on the joke - on April Fool鈥檚 Day in 2002 they posted a picture of an expiration date on the moon that they said they鈥檇 captured using the Hubble Telescope. They said at the time: "To be cautious, we should completely devour the Moon by tomorrow.鈥

Does the moon affect people鈥檚 sanity?

For years, people have believed that the cycle of the moon has had an impact on our psyche. The word lunacy even derives from Luna, the Latin for Moon. In 18th century England, you could get a lighter sentence if you said you were under the influence of a full Moon when committing a crime, and even as recently as the 1940s did a soldier plead for leniency in a murder trial due to 鈥榤oon madness鈥. The link with criminality has stuck around for decades since: in 2007, extra police officers were deployed in Brighton during full moons to prevent a feared upswing in crime.

One popular theory linking the full moon to insanity is that the moon affects the tides by pulling water in and out, and so it could be doing the same thing to the water in our bodies and brains. But this has been proved to be entirely false - besides, if it were true, it would exert the same amount of gravitational force whether it was full or not, given that the Moon remains the same size at all points during its cycle, just with different amounts of shadow.

Does the moon affect menstrual cycles?

Super Blood Wolf MoonImage source, NASA
Image caption,
The last Super Blood Wolf Moon happened in January 2019.

Another common myth is that the moon affects menstrual cycles. During the red blood full Moon in January 2019, lots of women were convinced it was messing with their periods, and even giving them magical powers.

But again, this is demonstrably false. The only reason there鈥檚 any link at all is because menstrual and moon cycles are very similar in length, meaning some women will happen to start or finish their cycle on a full moon. Nothing more, nothing less.

Is there a dark side of the moon?

It鈥檚 true that we can only see one side of the Moon from Earth. However, it鈥檚 definitely not the case that the other side is the dark side, even if it does make a good name for an album.

The truth is, the Moon has day and night, just as the Earth does. They last two weeks, so even though parts will be in darkness for quite a while, it will then see sunlight for a similar amount of time.

Is the moon getting closer to us?

the moon above the earthImage source, NASA
Image caption,
Loving someone to the moon and back will be a much bigger deal in a couple billion years.

No - in fact, it鈥檚 the complete opposite.

NASA says that the Moon is moving away from the Earth at a rate of about one inch per year.

The further the Moon moves away, the slower our planet rotates, which in a couple billion years, could have damaging effects on our seasons, making our winters Arctic and our summers unbearably hot. But we don鈥檛 have to worry about that just yet.

This article was published in July 2019

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