All Things Space, UFOs, etc.NASA Tracking Building-Sized Asteroid Nearing Earth Posted on May 21, 2025 by Administrator NASA is closely monitoring a building-sized asteroid as it makes its closest approach to Earth today, among a group of five other space rocks passing by our planet over the next two days. The asteroid, known to NASA as “2023 KU”, will zip past at a distance of approximately 657,000 miles, NASA’s Jet Propulsion Laboratory (JPL) has revealed.
