The biggest supermoon in almost 70 years will light up the sky tonight!

It's an astronomical event not to be missed.

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There's another supermoon on the way, and it's going to be bigger and brighter than it has been for almost 70 years.

Following October's supermoon, this next one is predicted to appear on November 14, when the Moon will be the closest it has been to Earth since 1948.

Experts say it will appear up to 14% bigger and 30% brighter than an average full moon, and as it's not scheduled to happen again until 2024, it's a moment stargazers won't want to miss.

What causes an "extra-super moon"?

According to NASA, the science behind this phenomenon starts with the egg-shaped orbit of the moon.

One part of the orbit known as the perigee, is about 30,000 miles closer to earth than the furthest part. When Earth, Sun and Moon line up as the Moon orbits the Earth (known as a syzygy), with the perigee side of the Moon facing us, we get what's called a perigee-syzygy. This effect causes the Moon to appear bigger and brighter than usual, resulting in a supermoon.

Although they aren't uncommon, with another supermoon due to appear in December, NASA argues November's event should be called "extra-super moon."

"On October 16 and December 14, the moon becomes full on the same day as perigee," NASA explains. "On November 14, it becomes full within about two hours of perigee—arguably making it an extra-super moon."

How can we see it?

NASA highlights that clouds or light pollution can sometimes mask the brightness of supermoons, so dark areas away from bright street lamps make ideal viewing spots.

And if you want to see the full moon at its best, it's expected to reach its peak at 1.52pm GMT on November 14th, so we should be able to see it later that night.

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