shroud could be removed, the mission probably would have failed anyway since the low velocity meant that Mariner 3 would miss Mars by several million miles. Three weeks later, on November 28, 1964, Mariner 4 was launched successfully on a 7½-month voyage to Mars. Instruments The instruments on Mariner 3 included: Television camera Magnetometer Plasma probe Cosmic ray telescope Trapped radiation detector Cosmic ray ionization chamber Cosmic dust detector See also Exploration of Mars List of missions to Mars Robotic spacecraft Space exploration References External links Mariner 3 Mission Profile by NASA's Solar System Exploration Space Flight Operations Plan Mariner Mars '64 (PDF) Missions to Mars Mariner program Spacecraft launched in 1964 Derelict satellites in heliocentric orbit Derelict space probes Spacecraft launched by Atlas-Agena rockets de:Mariner#Mariner 3 und 4