SKYGAZERS can look forward to an 'unusual' celestial event on Wednesday night when a Blue Moon rises in the sky for the first time since July 2015.

Blue Moons are defined as the second full moon in a calendar month.

And this one will also be a Supermoon, meaning the Earth's natural satellite will appear about 14% bigger and 30% brighter in the sky as it reaches its closest point to Earth.

But anyone in the British Isles hoping to see a lunar eclipse will have to jump on an aeroplane.

When can I see the Blue Supermoon?

Dr Gregory Brown, an astronomer at the Royal Observatory Greenwich, said the moon will rise at about 5pm on Wednesday and will remain in the sky until 8am the following morning.

He said: "It will be high in the sky from about 7pm and will be at its highest, and thus best, time at around 12.40am.

"This coming full moon is unusual in that it is the second full moon of the month, when typically there is only one full moon per calendar month.

"Also, the full moon will be slightly larger than normal given that this is also a Supermoon, so astrophotography will be more spectacular than normal."

What are the chances of seeing it?

Currently the weather forecast is for patchy cloud throughout Wednesday evening meaning there most residents should get at least a glimpse at some point. 

Will I also be able to see a lunar eclipse?

Those expecting to see a lunar eclipse will be disappointed as Dr Brown says it will 'definitely not be visible from the UK, not even a partial eclipse'.

The eclipse, according to Nasa, will be 'extra special' for those in the USA and other parts of the world such as the Middle East, Asia, eastern Russia, Australia and New Zealand, where the Blue Moon will coincide with a total lunar eclipse.

What's a Super Blue Blood Moon and how can I see it?

Nasa said: "While the Moon is in the Earth's shadow during the eclipse it will take on a reddish tint, known as a 'blood moon'.

"With the total eclipse, it'll be a royal spectacle indeed: a 'super blue blood' Moon."

But for those who miss out in the UK, there are a number of sites streaming how the Super Blue Blood Moon is looking on the other side of the world so you don't miss out. 

Click here to watch it from 11.30am tomorrow, Wednesday.

When will we see a lunar eclipse in the UK?

For those keen to see a lunar eclipse in the British Isles, Dr Brown advises putting July 27 in the diary for 'a more spectacular view' of the event.

If you manage to get a picture of tomorrow night's Blue Supermoon, don't forget to send them into us using the form below.