Keen-eyed stargazers in the southern hemisphere will be able to see a supermoon on Thursday night, but in the northern hemisphere it won't just be any supermoon.

It'll be a "super worm equinox moon".

Yep, just when you thought the names of supermoons couldn't be any more obscure or less science-based.

So where does the name come from?

The word equinox can be attributed to the fact that the supermoon happens to fall on the same day as the March equinox.

During the equinox, the sun crosses the plane of the Earth's equator, making night and day all over the Earth of equal length.

As for the worm part? In the northern hemisphere, full moons tend to get their name from Native American tribes and according to National Geographic, this moon coincides with the time of year when earthworms begin to emerge from the thawing winter soil.

How rare are they?

This is the first super worm equinox moon in 19 years, and follows a flurry of brilliant moons this season, including the super blue blood moon, super blood wolf moon and super snow moon.

Those who find themselves rolling their eyes at the constant stream of new supermoon names, there is good news: This is the last supermoon of 2019.

And we won't be seeing another super worm equinox moon until 2030.

For those who will be sad to see the back of the supermoon season, relive the celestial experiences with our super quiz.