The argument that "Earth will get a second moon for two months" is fundamentally true, but the second moon isn't what most people would picture. Rather than a natural satellite, the Earth will gain a tiny, captured asteroid named 2024 PT5—an object that's about the size of a car and which its discoverers have classified as a "mini-moon." Starting on September 29, 2024, this capture will happen and will last until about November 25, 2024, when 2024 PT5 will escape back into the solar system.