The International Astronomical Union’s (IAU) Minor Planet Center announced the discovery of three new moons in our solar system Feb. 23. Uranus has one additional moon, while Neptune has picked up two.
Neptune has a new moon, and it’s also the gas giant’s smallest to date — only a little over 20 miles across. It was discovered using the Hubble Space Telescope combined with a new method to track dim objects as they orbit.
