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If you looked at the sky on Tuesday night, you may have noticed a ring around the moon.
Many on social media have been commenting on the moon’s halo, being particularly prominent in Cork.
But what is this?
Talking with him Astronomy Ireland said it is caused by ice crystals high in the atmosphere.
The ice crystals “deflect the light from the Moon at exactly that distance from the Moon.”
Alan O’Reilly of Carlow Weather told the that halo is often seen before a period of low pressure.
“Folklore would say they appear before a storm,” O’Reilly said.
I just went out to have a look and a really clear halo, check it out! pic.twitter.com/iL9ja3uVyt
– Carlow Weather (@CarlowWeather) March 23, 2021
And he could be right.
According to Met Éireann, the rain will develop tomorrow in the west and will spread to the east during the afternoon.
The forecaster says the outlook for the rest of the week is “shaky.”
Met Éireann predicts that “it will be cold as the week progresses with heavy stormy rains that sometimes carry the risk of some winter rainfall.”
the @Spacial station passing the halo of the moon #Cork Not long ago. @AstronomyIRL @CorkAstronomy @VirtualAstro @daraobriain pic.twitter.com/OkKcvDHgQw
– Darren Gale (@ DarrenGale_1) March 23, 2021
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