The moon rises in Madrid on the eve of a supermoon, Nov. 13, 2016.
GERARD JULIEN/AFP/Getty Images
The supermoon sets behind the Philadelphia skyline, Nov. 14, 2016.
Joseph Kaczmarek/AP Photo
A man walks by as the supermoon is seen over the National Mall in Washington, D.C., Nov. 14, 2016.
The supermoon rises over Frankfurt am Main, Germany, Nov. 14, 2016.
Kuwaitis observe the "supermoon" spectacle in Kuwait City on Nov. 14, 2016.
The moon is at its closest position to earth since 1948, making the moon the brightest in nearly 69 years.
Yasser al-Zayyat/AFP/Getty Images
A full moon also known as the supermoon rises over over Jerusalem's Old City walls, Israel, Nov. 14, 2016.
A "supermoon" is seen over the sea in Cancun, Mexico, on Nov. 14, 2016.
Mauricio Collado/Xinhua via Newscom
The supermoon appears near the Statue of Liberty, Nov. 14, 2016, in New York City.
Julio Cortez/AP Photo
A moon rises over the Las Vegas Strip, as seen from the west hills on Monday, Nov. 14, 2016.
L.E. Baskow/Las Vegas Sun via AP
An airplane flies between the London Eye and the moon the night before the supermoon in London, Nov. 13, 2016.
The supermoon rises behind the Propylaea above the ancient Acropolis in Athens, Nov. 14, 2016.
Aris Messinisaris/AFP/Getty Images
A view of the moon against an artistic light display in Nantong, China, Nov. 14, 2016. The moon is at its closest to Earth between 1948 and 2034.
The "Supermoon" is seen over Tijuana, Mexico on Nov. 14, 2016.
Francisco Vega/AFP/Getty Images
The supermoon rises through the spans of the Sydney Harbour Bridge in Sydney, Nov. 15, 2016.
The supermoon rises over the Sydney Opera House in Sydney, Nov. 15, 2016.
The supermoon is seen rising behind the Soyuz MS-03 spacecraft at the launchpad at the Russian-leased Baikonur Cosmodrome in Kazakhstan, Nov. 14, 2016.
A full moon, also known as the supermoon, rises over Zabi Szczyt in the Tatra Mountains near Zakopane, Poland, Nov. 14, 2016.
The full moon rises over the Toronto skyline, Nov. 14, 2016. The phenomenon known as the supermoon occurs because the moon follows a varying elliptical orbit around Earth. This week the moon is coming closer to Earth than at any other time since January 1948.
Mark Blinch/The Canadian Press via AP
A supermoon rises at sunset over lower Manhattan in New York City, Nov. 13, 2016, as seen from Watchung, New Jersey.
Gary Hershorn/Getty Images
The supermoon rises from behind apartment buildings in Beijing, Nov. 14, 2016. The brightest moon in almost 69 years will be lighting up the sky this week.
Ng Han Guan/AP Photo
The supermoon is seen over the Galata Tower in Istanbul, Nov. 14, 2016.
The supermoon sets behind the Chrysler Building in New York City, Nov. 14, 2016.
The moon rises over the St. Louis Arch as seen from the Compton Hill Water Tower before the peak of the "supermoon" phenomenon on Nov. 13, 2016.
David Carson/St. Louis Post-Dispatch via Polaris