Subscribe to CNN's Wonder Theory Science Newsletter. Dive into updates on groundbreaking discoveries, innovative scientific research, and the mysteries of the cosmos. A tiny celestial object, once nicknamed Earth's temporary "mini-moon" last year, could actually be a fragment of the Moon that broke away thousands of years ago. The near-Earth body, officially named 2024 PT5, has an estimated width of 33 feet (10 meters). Even so, researchers confirm that its trajectory poses