Saturn as seen by Cassini in 2017. Photo: NASA/JPL-Caltech/SScI
Scientists have found 20 never-before-seen moons orbiting Saturn, making it the planet with the most known moons in our solar system.
Why it matters: The newfound natural satellites increase Saturn's moon count to 82, eclipsing Jupiter's 79 known moons.
Details: The new moons are each about 3 miles across, and 17 of them orbit the ringed planet in retrograde — going the opposite direction of Saturn's rotation, according to an announcement from Carnegie Science.
- Those 17 retrograde moons take more than 3 years to orbit the planet and are thought to be the remnants of a larger moon that broke apart in the past.
Go deeper: Enter a contest to help name the newly discovered moons from now until Dec. 6.