Helios the fastest spacecraft probe

Helios 1NASA estimates that the unmanned Helios solar probes 1 (launched on December 10, 1974) and Helios 2 (January 15, 1976) reached a speed of 252.800 km / h in space. These ships, built in a joint project between the U.S. and Germany, studied the effects and properties of solar radiation. Not only were the fastest, in addition, on 16 April 1976, the Helios 2 approached 43,432,000 miles from the sun, so the record of the flight got closer to this Astre of a spaceship.

These projects were important information on plasma vients and solar cosmic rays and particles, in addition to carrying out experiments on magnetic and electric fields.

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