NASA set to launch 4 spacecraft to solve magnetic mystery

March 12, 2015 5:51 PM

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CAPE CANAVERAL, Fla. (AP) — NASA is sending four identical spacecraft on a billion-dollar mission to study the explosive give-and-take of the Earth and sun's magnetic fields.

Liftoff of the unmanned Atlas rocket — and NASA's Magnetospheric Multiscale spacecraft — was set for 10:44 p.m. Thursday. Forecasters put the odds of good weather at 70 percent.

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