Earth has captured an asteroid that's spending time in space acting as a mini-moon, or baby moon, to our planet. The International Astronomical Union named the asteroid spinning around Earth a temporary captured object and, for the time being, it's acting like a tinier version of our moon. Astronomers discovered this mini-moon on February 15 using the Catalina Sky Survey in Arizona, and ten days later, the IAU filed it as 2020 CD3. "Orbit integrations...indicate that this object is temporarily bound to the Earth," the IAU filing reads.