The asteroid known as 2024 YR4 is out of sight yet still very much on scientists' minds as its revised trajectory is now drawing attention to another possible target: the moon.
HOUSTON — The asteroid known as 2024 YR4 is out of sight yet still very much on scientists' minds.
The building-sized object, which initially appeared to be on a potential collision course with Earth, is currently zooming beyond the reach of telescop... [6613 chars]