The Mariner program was conducted by the American space agency NASA to explore other planets. Between 1962 and late 1973, NASA's Jet Propulsion Laboratory (JPL) designed and built 10 robotic interplanetary probes named Mariner to explore the inner Solar System – visiting the planets Venus, Mars and Mercury for the first time, and returning to Venus and Mars for additional close observations.
Mariner program: Mariner 9 is launched to map 70% of the surface, and to study temporal changes in the atmosphere and surface, of Mars.
On May 30, in the year 1971, Mariner program: Mariner 9 is launched to map 70% of the surface, and to study temporal changes in the atmosphere and surface, of Mars. This event is recorded as a Historical Events event in the history of May 30, one of 466 recorded events on this date across all of history.
Key Facts
- This event took place on May 30, 1971 (AD era).
- It is categorised as a Historical Events event in recorded history.
- Referenced in 3 Wikipedia articles.
- Wikipedia source last updated on 29 April 2026.
On This Date in History 466
This article draws on content from Wikipedia, available under CC BY-SA 4.0.
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