Monday's supermoon is the first of four this year.
During a supermoon, the full moon inches a little closer than usual to Earth. A supermoon isn't bigger, but it can appear that way in the night sky, although scientists say the difference can be barely perceptible.
September's supermoon will coincide with a partial lunar eclipse. October's will be the year's closest approach, and November's will round out the year.
More a popular term than a scientific one, a supermoon occurs when a full lunar phase syncs up with an especially close swing around Earth. This usually happens only three or four times a year and consecutively, given the moon's constantly shifting, oval-shaped orbit.
The supermoon rises behind the historical site of Giza Pyramids, near Cairo, Egypt, Monday, Aug. 19, 2024. Credit: AP Photo/Amr Nabil
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The supermoon rises behind the historical site of Giza Pyramids, near Cairo, Egypt, Monday, Aug. 19, 2024. Credit: AP Photo/Amr Nabil
The super moon rises behind the Dome of the Rock shrine at the Al Aqsa Mosque compound in the Old City of Jerusalem, Monday, Aug. 19, 2024. Credit: AP Photo/Leo Correa
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The super moon rises behind the Dome of the Rock shrine at the Al Aqsa Mosque compound in the Old City of Jerusalem, Monday, Aug. 19, 2024. Credit: AP Photo/Leo Correa
A cable car heads toward Sugarloaf Mountain as the supermoon rises into the night sky in Rio de Janeiro, Monday, Aug 19, 2024. Credit: AP Photo/Bruna Prado
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A cable car heads toward Sugarloaf Mountain as the supermoon rises into the night sky in Rio de Janeiro, Monday, Aug 19, 2024. Credit: AP Photo/Bruna Prado
The sun sets as Shiite pilgrims march on their way to Karbala for Arbaeen in Babil, Iraq, Monday, Aug. 19, 2024. Credit: AP Photo/Hadi Mizban
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The sun sets as Shiite pilgrims march on their way to Karbala for Arbaeen in Babil, Iraq, Monday, Aug. 19, 2024. Credit: AP Photo/Hadi Mizban
Residents watch the supermoon rise over the "Memorial JK," a monument in honor of the founder of Brasilia, Brazil, Monday, Aug. 19, 2024. Credit: AP Photo/Eraldo Peres
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Residents watch the supermoon rise over the "Memorial JK," a monument in honor of the founder of Brasilia, Brazil, Monday, Aug. 19, 2024. Credit: AP Photo/Eraldo Peres
The super moon rises behind the Temple of Poseidon at Cape Sounio, south of Athens, Monday, Aug. 19, 2024. Credit: AP Photo/Michael Varaklas
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The super moon rises behind the Temple of Poseidon at Cape Sounio, south of Athens, Monday, Aug. 19, 2024. Credit: AP Photo/Michael Varaklas
The supermoon rises from behind a resident building in Berlin, Monday, Aug. 19, 2024. Credit: AP Photo/Markus Schreiber
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The supermoon rises from behind a resident building in Berlin, Monday, Aug. 19, 2024. Credit: AP Photo/Markus Schreiber
A supermoon rises behind the Burj Khalifa, world's tallest tower in Dubai, United Arab Emirates, Monday, Aug. 19, 2024. Credit: AP Photo/Altaf Qadri
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A supermoon rises behind the Burj Khalifa, world's tallest tower in Dubai, United Arab Emirates, Monday, Aug. 19, 2024. Credit: AP Photo/Altaf Qadri
A blue supermoon rises over the Crescent City Connection bridge in New Orleans, Monday, Aug. 19, 2024. Credit: David Grunfeld/The Times-Picayune/The New Orleans Advocate via AP
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A blue supermoon rises over the Crescent City Connection bridge in New Orleans, Monday, Aug. 19, 2024. Credit: David Grunfeld/The Times-Picayune/The New Orleans Advocate via AP
A nearly full supermoon rises in the sky after rain in Beijing, Monday, Aug. 19, 2024. Credit: AP Photo/Andy Wong
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A nearly full supermoon rises in the sky after rain in Beijing, Monday, Aug. 19, 2024. Credit: AP Photo/Andy Wong
The super moon rises in the clouds over St. Petersburg, Russia, Monday, Aug. 19, 2024. Credit: AP Photo/Dmitri Lovetsky
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The super moon rises in the clouds over St. Petersburg, Russia, Monday, Aug. 19, 2024. Credit: AP Photo/Dmitri Lovetsky