NASA Tracking Truck-Sized Asteroid Approaching Earth
NASA is tracking a truck-sized asteroid which is set to hurtle by Earth today at many times the velocity of a speeding bullet ...
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Graphic: The distance between Earth and the moon is filled with a mind-boggling amount of spacecraft — and space itself
The airless chasm between Earth and the moon is ... This includes the demarcation between Earth and space itself, called the Karman Line. NASA and the Fédération Aéronautique Internationale ...