This Week in Space Exploration - Mariner 9

 

This Week's Historical Theme: Space Exploration

30 May 1971

A significant event throughout the history of space exploration is the Mariner 9 departing for Mars. The U.S. unmanned space probe was launched to gather scientific information on Mars, the fourth planet from the sun. It is one of the greatest technological achievements in human history. The space craft was launched on 30 May 1971 and entered the planets obit on 13 November the same year. As the first spacecraft to orbit a planet other than Earth, Mariner 9 sent back more than 7,000 pictures of the "Red Planet" and succeeded in photographing Mars in its entirety.

It circled Mars twice each day for almost a year gathering data on the atmospheric and surface composition, density, pressure, and temperature. When Mariner 9 first arrived, Mars was completely obscured by dust storms which persisted for a month. Once these cleared, the space probe revealed the enormous volcanos and a gigantic canyon stretching 3,000 miles across the planet's surface. The probe also recorded what appeared to be dried riverbeds, suggesting the ancient presence of water and perhaps life on the planet. It also sent back the first close-up images of the Martian Moon. Its transmission ended on 27 October 1972.

Want to find out more about Mariner 9? Click here for more information, or here to find out more about the history of space exploration.