National Geographic
Menu

Tag archives for fireball

Russian Meteor a Surprise—But Many More Out There

The spectacular meteor explosion above Russia‘s Ural Mountains this morning was caused by a likely truck-size rock weighing in at about nine tons. (Related pictures: “Meteorite Hits Russia.”) It hit the atmosphere at an estimated 31,000 miles (50,000 kilometers) per hour, and at that high velocity—many times the speed of sound—tremendous air pressure caused the…