A 1,300-Pound NASA Satellite Is Falling Back to Earth. What Could Go Wrong?

<![CDATA[A NASA research satellite weighing roughly 1,300 pounds is falling back to Earth after more than a decade in orbit. The spacecraft is known as Van Allen Probe A, one of two satellites launched by NASA in 2012 to study Earth's radiation belts. Engineers expected the spacecraft to remain in orbit for years, gathering data about charged particles trapped in Earth's magnetic field. Now the mission has ended, and gravity started doing its thing.]]>