NASA discovers secret moon orbiting nearby 'planet killer' asteroid after recent close approach to Earth
New NASA images of a mountain-size, "planet killer" asteroid that made its closest approach to Earth last month have revealed a surprise companion circling the massive space rock. https://www.livescience.com/space/asteroids/nasa-discovers-secret-moon-orbiting-nearby-planet-killer-asteroid-after-recent-close-approach-to-earth