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Explorer 14
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<p>Explorer 14, also called EPE-B or Energetic Particles Explorer-B, was a <a href="/facts/NASA/TIMCV0yV">NASA</a> spacecraft instrumented to measure cosmic-ray particles, trapped particles, solar wind protons, and <a href="/facts/Magnetosphere/BXzgPoPy">magnetospheric</a> and <a href="/facts/Interplanetary_magnetic_field/AvWnxtbQ">interplanetary magnetic fields</a>. It was the second of the S-3 series of spacecraft, which also included Explorer 12, 14, 15, and 26. It was launched on 2 October 1962, aboard a <a href="/facts/Thor-Delta/XyulmLAY">Thor-Delta</a> launch vehicle. </p>