From Beijing to Berlin, stargazers around the world have admired the supermoon - the largest, brightest full moon in nearly seven decades but heavy cloud cover over Ireland might obscure the view in many places.
The term supermoon is used as the full moon appears up to 14% bigger and 30% brighter than usual as it travels closer to Earth than at any time since 1948.
The event, described as "undeniably beautiful" by American space agency NASA, will not be matched until the moon makes a similar approach in 2034.
Astronomy Ireland's David Moore has forecast the moon will be at its closest to Ireland at around midnight.
The supermoon, also known as a blood moon, was produced when the shadow of Earth cast a reddish glow on the moon, the result of a rare combination of an eclipse with the closest full moon of the year.
Earlier, the gap between the Earth and the moon closed to its shortest point, known as the perigee - a distance of 356,509km (221,524 miles).
The brilliant white glow of the moon slowly transformed into a dim red, a colouring caused by Earth's atmosphere scattering sunlight into the shadow.
In Australia, some sky-watchers climbed to the top of the Sydney Harbour Bridge to get a closer view of the moon as it ducked between the clouds over the city.
In New York City, the Chrysler Building lit up when the supermoon set behind the Art Deco-style skyscraper, and photographers captured the moon rising over the US Capitol dome in Washington D.C.
Spectators lined up in France, Israel and Germany to watch the moon rise behind famous monuments like the Eiffel Tower,Dormition Abbey, and the Brandenburg Gate.
The full moon also shone over Jakarta in Indonesia and Thailand's Bangkok while in the Philippines, park-goers watched the spectacle in Manila.
Today's event is the biggest and best in a series of three supermoons. The first was on 16 October and the third is due on 14 December.