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 telescopes on its orbit around the sun. And as scientists wait for it to reappear, its revised trajectory is now drawing attention to another possible target: the moon. https://cnn.it/3IJmjsZ | CNN