NASA's Jet Propulsion Laboratory has issued alerts for five asteroids approaching Earth, and one of them is quite massive - about 950 feet in diameter, or roughly the size of a football stadium ¹ ². This stadium-sized asteroid, named 2024ON, is expected to pass by Earth today, September 17, at a safe distance of 621,000 miles, which is nearly three times farther than the moon's average distance ¹ ².