Why NASA is Exploring the Edge of Our Planet (VIDEO)

NASA/Goddard Space Flight Center

Caption

GOLD launches Jan. 25, 2018, to study the dynamic region where space and Earth's uppermost atmosphere meet. Here's why NASA is exploring the edge of our home planet. Download in HD: http://svs.gsfc.nasa.gov/12817

Credit

NASA's Goddard Space Flight Center/Joy Ng

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