Tonight may be the closest we come in ageneration to staring down a bullet the size of a skyscraper.

A battleship-size asteroid will miss hitting Earth today by about 334,000 miles, scientists say. It is about 95,000 miles farther out than the moon. The NASA-sponsored Catalina Sky Survey discovered the asteroid TU24 on Oct. 11, 2007. It has been estimated to be 500 to 2,000 feet in size and originated from an area of the solar system between Mars and Jupiter. This is the closest an asteroid of this size has ever come to Earth, NASA officials said. Another asteroid of this size is not expected to come near Earth again until 2027, scientists say.