The rover that lived twenty-five times longer than it was planned
In short: NASA's Spirit rover was designed to survive for just 90 sols on the Martian surface. Instead, it endured six years of brutal conditions, traveling across the red planet to uncover a wet, ancient past. It became a mechanical workhorse that defied every engineering expectation.
Spirit was launched on June 10, 2003, with a mission duration intended to last only 90 sols. S1:p1 The rover ultimately operated for 6 years, 2 months, and 19 days, exceeding its original design life by more than 25 times. S2:p2 The machine weighed approximately 2,341 pounds during its journey. It was launched from the Cape Canaveral site in Florida. This resilient vehicle successfully navigated the harsh Martian environment for over 4.8 miles. It survived conditions that were never part of its initial design parameters.
The primary scientific objective of the Mars Exploration Rover (MER) mission was to search for rocks and soil types that provided clues about past water activity on Mars. S2:p4 Spirit and its twin, Opportunity, were deployed to opposite sides of the planet to investigate sites where conditions may have once been favorable to life. S2:p1 The rovers were roughly the size of a standard golf cart. They were seven times heavier than the Sojourner rover from 1996. These twin machines were sent to explore locations suspected of past liquid water. Spirit provided strong evidence that the planet was once much wetter.
To conduct its research, Spirit used a robotic arm called the instrument deployment device (IDD) to place a suite of tools—including the Mössbauer Spectrometer and the Rock Abrasion Tool—directly onto the Martian soil and rocks. The panoramic mast held cameras positioned about 5 feet above the ground. These tools provided 360-degree stereoscopic views of the terrain. Other instruments included an Alpha Particle X-ray Spectrometer and a Microscopic Imager. Magnets were also used to collect various dust particles.
S2:p5 Despite its resilience, Spirit went silent in March 2010, and NASA officially declared its mission complete on May 25, 2011. S2:p2 The rover was officially designated as MER-A. It was part of a larger Mars Exploration Program. The mission was managed by NASA and the Jet Propulsion Laboratory. It remained marooned after the 2010 silence.
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Sources
- Summary by Intellect · source: NASA Spirit's Final Images on Mars Broke Me
- Also: Spirit - NASA Science
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