On Feb. 15th an asteroid about half the size of a football field will fly past Earth only 17,200 miles above our planet's surface. There's no danger of a collision, but the space rock, designated 2012 DA14, has NASA's attention.
"This is a record-setting close approach," says Don Yeomans of NASA's Near Earth Object Program at JPL. "Since regular sky surveys began in the 1990s, we've never seen an object this big get so close to Earth."
See http://science.nasa.gov/science-news/science-at-nasa/2013/28jan_2012da/ for more information, and see the video on YouTube at http://www.youtube.com/watch?v=GwidzVHvbGI.