Astronomers have completed a comprehensive examination of large asteroids that zoom near our planet, determining that Earth probably won't be struck by such an object for at least 1,000 years.
You may not want to breathe a sigh of relief just yet, however: The newly completed catalog looks at near-Earth objects (NEOs) at least 0.6 miles (1 kilometer) wide and therefore doesn't rule out strikes from smaller, yet still potentially dangerous, asteroids.
