Imagine travelling across the solar system, seeing sight and sounds unheard of to bring a cupful of rocks to Utah. This is the story of spacecraft Osiris-Rex.
An asteroid that might be bigger than the Empire State Building is expected to fly past Earth over the weekend.
Asteroid 2002 NN4, as NASA has labeled it, could be up to 18-hundred feet in diameter when it passes by on Saturday.
New York City's iconic Empire State Building is more than 14-hundred feet tall. Astrono
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