What happened on Mars? NASA's MAVEN arrives Sunday to find out.

September 17, 2014 9:22 PM

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After 10 months and 442 million miles, the orbiter is scheduled to begin orbiting Mars this weekend. MAVEN will spend a year gathering information about the planet's upper atmosphere, in an effort to learn what made Mars inhospitable to life.

NASA's latest Mars orbiter MAVEN is on final approach to the red planet, leaving mission scientists and flight controllers with little more to do than make sure their seats are in the full, upright position with tray tables securely locked.

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