In Chicago, summer officially beginning at 9:42 p.m. "It's the longest day of the year," NBC 5 Storm Team Meteorologist Kevin Jeanes said, with 15 hours and 14 minutes of sunlight.

The moon, by comparison, is around 238,855 miles (384,400 kilometers) away from Earth. Referred to as "city killer," the asteroid - which measures between 40 and 100 meters (131 to 328 feet) in ...