Early risers tomorrow morning could see a total eclipse of the Moon, an event which is caused when the Moon enters the Earth's shadow and appears to turn reddish orange.
It will be almost four years before it happens again.
Frances McCarthy, an Education and Outreach Officer at Blackrock Castle Observatory in Co Cork, said this event is known as a 'Blood Moon'.
Speaking to RTÉ's Morning Ireland, she said this is because the sunlight is going through the Earth's atmosphere.
"The full Moon, which we will see setting very early tomorrow morning, will be setting as it is eclipsed," she explained.
"So the sunlight will be blocked from reaching it, except for a little bit, which goes to the Earth atmosphere.
"It ends up with a beautiful reddy dark coloured moon."
Ms McCarthy warned that the eclipse would set early and anyone who wants to witness it should be up before 7am.
She advised people to go to high ground in order to see it best, because cloud cover can often obstruct the view.
"The moon will start moving into the Earth's shadow just before 4am but that will be quite a subtle change," she said.
"It'll be a quite a bit better from about six o'clock."
