How many moons you say?
Astronomers have discovered that Earth's large, ever-looming moon is about to get company.
Beginning on Sunday, the planet will capture an asteroid sailing nearby, drawing it in for one loop around Earth before making its exit on Nov. 25. When it leaves, it will continue its trajectory around the sun. The two-month visit puts this space rock in the class of so-called "mini-moons."
Compared to mini-moons of the recent past, 2024 PT5 is a short-timer. In July 2006, a visitor dubbed RH120 stayed in orbit around Earth for a year before getting flung out in July 2007.