"NASA Captures Stunning Radar Images of Stadium-Sized Asteroid's Earth Flyby"

NASA's powerful radar system captured images of the stadium-sized asteroid 2008 OS7 as it passed by Earth at a safe distance of 1.8 million miles. The radar observations helped refine the asteroid's size to be around 500 to 650 feet across, smaller than initially estimated, and revealed its unusually slow rotation rate of one full rotation every 29.5 hours. The asteroid, designated as "potentially hazardous," won't come as close to Earth for another 200 years.