Mariner 4 flyby of Mars takes the first close-up photos of another planet. The photographs take approximately six hours to be transmitted back to Earth.

Mariner 4 was the fourth in a series of spacecraft intended for planetary exploration in a flyby mode. It was designed to conduct closeup scientific observations of Mars and to transmit these observations to Earth. Launched on November 28, 1964, Mariner 4 performed the first successful flyby of the…