Explorer 6, launched August 7, 1959 by NASA, took the first photographs of Earth from a satellite. On board it carried a Beacon (108 and 378 MHz) to measure electron density, Fluxgate magnetometer, an ion chamber and Geiger-Muller Counter, a micrometeorite detector, a proportional Counter Telescope, a scintillation counter, search-coil magnetometer, a TV Optical Scanner, and a VLF Receiver.
Explorer 6 operated until October 6, 1959 when the last contact was made with the satellite. It reentered the atmosphere on July 1, 1961.
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