While NORAD Tracks Santa, NASA Will Keep Watch On A Giant Asteroid This Christmas Eve

By Chris SpearsDENVER (CBS4) – Government radars will be busier than normal on Christmas Eve tracking everything from Santa and severe weather to a giant asteroid that will make its closest approach to Earth on Thursday.
It’s a pretty big asteroid known as 2003 SD220.Scientists with NASA will be using radar to try and learn more about this object, including its size, shape and surface features as it zooms by.
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(credit: nor