Mars probes

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A series of probes to the planet Mars, launched by the former Soviet Union. Technical problems meant that most of them were complete or partial failures, although Mars 5 did send some photographs from orbit around the planet.

Mars Probes


Launch date


Mars 1

1962 November 1

Radio contact lost en route

Mars 2

1971 May 19

Entered Mars orbit November 27; ejected lander which crashed

Mars 3

1971 May 28

Entered Mars orbit December 2; ejected lander, but transmissions failed

Mars 4

1973 July 21

Intended Mars orbiter; passed Mars 1974 February 10 after braking rocket failure

Mars 5

1973 July 25

Entered Mars orbit 1974 February 12

Mars 6

1973 August 5

Flew past Mars 1974 March 12 and ejected lander, which crashed

Mars 7

1973 August 9

Flew past Mars 1974 March 9 and ejected lander, which missed the planet

Subjects: Astronomy and Astrophysics.

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