Missed last night's blue moon? An 'extremely rare' event will take place in tonight's sky

Plus when to see three more supermoons this year — and an eclipse

Stargazers will be in with a chance to see an even rarer event this evening. Picture: Owen Humphreys/PA Wire

A rare supermoon lit up the sky last night across Ireland, but tonight will be the main event, according to Astronomy Ireland.

The spectacle is known as a blue moon and usually occurs about every two to three years.