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[TESS: Transiting Exoplanet Survey Satellite. Integration and Testing]

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Spacecraft components are often built in different places. Integration brings all these pieces together.

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Engineers move TESS's spacecraft structure into a cleanroom at Orbital ATK in Virginia.

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TESS's four cameras will look for small, regular dips in the brightness of stars.

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Called transits, these dips could be caused by orbiting planets.

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Engineers mount TESS's cameras to their support structure.

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The cameras were designed and developed by MIT.

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The cameras are insulated to protect them from extreme temperatures in space:

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248 degrees Farenheit in sunlight and -148 in shade.

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The cameras are then joined to the spacecraft's main body.

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Over the next two years, the cameras will image 85 percent of the sky,

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searching for other worlds around nearby stars.

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Engineers deploy the solar arrays. The arrays must full extend

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to produce the power the spacecraft needs.

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This and many other tests ensure TESS will survive the stresses of launch and its time in space.

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TESS is ready for transport to NASA's Kennedy Space Station.

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The mission is slated for launch in 2018.

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