More than 100 moons were discovered in our own solar system in 2025
Astronomers discovered a new moon of Uranus and hundreds of moons around Saturn over the past year, and there may be many more yet to be found
Space
Astronomers discovered a new moon of Uranus and hundreds of moons around Saturn over the past year, and there may be many more yet to be found
24 December 2025
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Uranus’s new moon, S/2025 U1, was spotted using the James Webb Space Telescope
NASA/ESA/CSA/STScI/M. El Moutamid (SwRI)/M. Hedman (University of Idaho)
This year, astronomers discovered more than 100 previously unknown moons in our own solar system. There may be many more yet to be discovered, and cataloguing them could help us better understand how planets form.
In March, Edward Ashton at Academia Sinica in Taiwan and his colleagues discovered 128 moons around Saturn, bringing the planet’s total to 274. The team gathered hours’ worth of images from the Canada-France-Hawaii Telescope in Hawaii and stacked them on top of each other to spot objects that are otherwise too dim to see.
Ashton’s team now has the right to name the new moons, although Saturn’s moons are so numerous that many are no longer given informal names.