This week, astronomers are anticipating the close approach of asteroid 2011 UL21, dubbed the "Planet Killer," as it swings by Earth. Despite its size of approximately 2.5 kilometers in diameter, it will pass at a safe distance of 4.1 million miles—farther than the moon. Recently discovered asteroid 2024 MK, smaller but still considered hazardous, has raised concerns due to its potential impact risks. Astronomers caution that an asteroid of this size could cause significant damage if it were to collide with Earth, underscoring ongoing efforts in planetary defense and monitoring.
