Asteroid 2025 YU15 will sweep past Earth at remarkable speed this February, drawing global attention and raising questions about how closely scientists are watching the next celestial visitor.

See asteroid Dimorphous, pre- and post-impact, in this time-lapse of Hubble Space Telescope imagery. The space rock was impacted by NASA DART mission. Credit: SCIENCE: NASA, ESA, STScI, Jian-Yang Li ...