On 20 and 21 March, skygazers in the UK will be treated to the last supermoon of 2019, and it's a pretty special one. Dubbed the Super Worm Moon, it coincides with the spring equinox this year. Here, we explain what the supermoon is, as well as how and when to see it.

What is the supermoon?

The supermoon happening on 21 March will be the third and final supermoon of 2019, following February's biggest and brightest full moon and January's 'Blood' moon.

A supermoon is a full moon that appears larger and brighter than normal, because the moon is closer to Earth than it will be later in the year.

This one is set to be particularly special, as it coincides with the spring equinox, during which the Earth's axis is not tilted towards or away from the sun - it's perfectly level. The simultaneous supermoon and spring equinox only happens once every 19 years (and in fact didn't quite line up in 2000 so it has even longer than that this time), so is quite rare.

Its name, the Super Worm Moon because it coincides with the time of year when earthworms begin to emerge in spring.

When can you see the supermoon?

In the UK, the exact time of the supermoon is 1.43am on 21 March, but if you don't fancy staying awake to see it it'll be bigger and brighter than normal throughout the evening of 20 March and into the morning of 21 March.

You won’t need to use any special equipment to see the super moon - it’ll be huge! But a telescope or binoculars will be safe to use if you want a closer look.

Following this supermoon you’ll need to wait until early 2020 to see another, when the moon is once again closer to Earth.

How to watch the supermoon online: live stream

YouTube user Gian Masi will be sharing the supermoon live stream courtesy of Virtual Telescope from 16.45pm GMT. You can watch the stream below: