The rise of the "supermoon" event, where the full moon appears at its largest and brightest in the night sky. It's the first of six major celestial events.
The moon officially became its fullest and coincides almost perfectly with the moon's perigee — that is, the moment when the moon is closest to Earth in its orbit. This supermoon will be especially pronounced given that this will be the moon's closest approach of the year.
The supermoon will have an effect on tides, though experts say there's no need for alarm since the increased effect is still relatively weak. That's not to say a supermoon hasn't caused damage in the past: It's believed that a supermoon event may have contributed to the sinking of the Titanic 100 years ago.
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