Asteroids Ceres & Vesta
Ceres & Vesta Meet
Two of the largest asteroids are currently passing near each other (as viewed from Earth).  
Ceres at 590 miles (950 km) across is the largest asteroid known.  Vesta at 326 miles (525
km) across is the third largest known.  Note -- the asteroid that took out the dinosaurs was
estimated at only 6 miles across. Ceres and Vesta have reasonably stable orbits and are not
to be worried about.  Besides, I will keep an eye on them for you :).  Drawing taken at
10:10 PM EDT on 5-July-2014 at Carrs Mill Park, Howard County, Maryland.