Tags: Artificialsatellite, Satellite.

Ranger 4 was a spacecraft of the Ranger program designed to transmit pictures of the lunar surface to Earth stations during a period of 10 minutes of flight prior to crashing upon the Moon to rough-land a seismometer capsule on the Moon to collect gamma-ray data in flight to study radar reflectivity of the lunar surface and to continue testing of the Ranger program for development of lunar and interplanetary spacecraft.

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