The Hunt Is On for Moons Around Ultima Thule

By Mike Wall The most distant celestial object ever explored may well have moons, and astronomers are trying hard to find them. In the wee hours of Jan. 1, NASA’s New Horizons spacecraft zoomed past the small, frigid object Ultima Thule, which lies more than 4 billion miles (6.4 billion kilometers) from Earth. The probe has …