NASA captured this photo of the first and only supermoon of 2017 as it rises behind Washington, DC on Dec. 3. A supermoon occurs when the moon's orbit is at its closest to Earth at the same time it is full. If you missed seeing it in person, you won't have to wait another year for your next chance to glimpse it. Two more will occur on Jan. 1 and Jan. 31, 2018. Meanwhile, enjoy the supermoon in all its majesty with our gallery of photos from around the world.