Successful Rock Tracking
For the first time, investigators tracked a small asteroid (a few meters in size) before it hit the earth. A telescope that is part of the Catalina Sky Survey, based near Tucson, Ariz., is part of an effort to locate near-earth objects that could pose a collision hazard. It picked up the body, dubbed 2008 TC3, on October 6. Researchers then correctly predicted that the space rock would enter the atmosphere at 12.8 kilometers per second over northern Sudan at 5:46 A.M. local time the next day, releasing approximately one kiloton of energy. Objects of this size strike the earth once every few months.
Note: This article was originally published with the title, "News Scan Briefs".
This article was originally published with the title Blocking Sound with Holes.