Ranger 4

RangerNASA launches the Ranger 4 lunar probe, built by Jet Propulsion Laboratory and intended to go directly to the moon, transmitting pictures of the surface back to Earth until it impacts the lunar surface. Another attempt to successfully launch the modified design including a seismology probe, this is the first Ranger launch in which the Agena second stage works perfectly. Unfortunately, a failure in Ranger 4’s onboard computer sends it tumbling, unable to acquire communications with Earth. Tracking the transmitter of the seismology probe, NASA determines that Ranger 4 indeed slams into the lunar far side, but without taking or transmitting a single picture, still resulting in a mission failure.

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