![This image shows the different groupings of moons orbiting Jupiter, with the newly discovered moons displayed in bold. The \](http://www.ecns.cn/hd/2018/07/18/2bfa9b92e43942acbf92a9233f884729.jpg)
This image shows the different groupings of moons orbiting Jupiter, with the newly discovered moons displayed in bold. The "oddball" moon, known as Valetudo, can be seen in green in a prograde orbit that crosses over the retrograde orbits.(Photo/VCG)
During a quest to find Planet Nine, a mysterious planet believed to be on the edge of our solar system, astronomers discovered something else: 12 new moons around Jupiter. And one of them is quite the oddball. The discoveries bring the number of Jupiter's known moons to 79, the most around a single planet in our solar system.
![NASA\'s Juno spacecraft captures Jupiter\'s southern hemisphere, as the spacecraft performed its 13th close flyby of Jupiter on May 23, 2018.](http://www.ecns.cn/hd/2018/07/18/5624858c123e44fc996b5d7d93d21e23.jpg)
NASA's Juno spacecraft captures Jupiter's southern hemisphere, as the spacecraft performed its 13th close flyby of Jupiter on May 23, 2018.
![Images taken in May 2018 with Carnegie\'s 6.5-meter Magellan telescope at the Las Campanas Observatory in Chile. Lines point to Valetudo, the newly discovered \](http://www.ecns.cn/hd/2018/07/18/d1e5011291f94f8aa0f0356729082b74.jpg)
Images taken in May 2018 with Carnegie's 6.5-meter Magellan telescope at the Las Campanas Observatory in Chile. Lines point to Valetudo, the newly discovered "oddball" moon.(Photo/VCG)