Stargazers around the world posted their photos of the lunar event, including former American astronaut Buzz Aldrin.
Did you see the full Moon this morning at 6:45am ET? It's the last in a series of four #supermoon this year. This flower Moon will appear full for about three days around this time, from Tuesday evening through Friday morning. Post a picture if you saw it! pic.twitter.com/iilj8GB3HK
A supermoon occurs when the full moon coincides with the moon's closest approach to Earth in its orbit, making the moon appear brighter and closer than normal.
Last night's supermoon is named after the flowers that are abundant at this time of year in the United States, where it is spring.
It also has special significance for Buddhists, who celebrate a traditional holiday called Vesak at the time of the Flower Moon.