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NASA’s Juno spacecraft has shed new light on an old mystery.

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For centuries, scientists have debated the origin of the Zodiacal Light...

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which appears above the horizon after dusk and before dawn.

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♪♪♪

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The Zodiacal Light is sunlight, scattered by an interplanetary cloud of dust.

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Scientists thought that the dust comes from asteroids or comets.

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(Launch commentary by George Diller)
And liftoff of the Atlas V with Juno on a trek to Jupiter!

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In 2011, Juno launched and spent five years traveling to Jupiter.

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During its journey, Juno was repeatedly struck.

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♪♪♪

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Dust grains pelted the solar arrays, excavating debris.

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Cameras on Juno saw the debris, providing data on the impacts.

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Juno had flown through the dust cloud that causes the Zodiacal Light...

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allowing scientists to map its distribution for the first time.

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The map pointed to an unexpected source for the dust - Mars.

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Mars could be ejecting the dust during global dust storms.

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♪♪♪

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Juno’s findings will help to protect future missions...

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that will pass through this dusty region of space.

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♪♪♪