NASA on Monday declared an end to the Phoenix mission, some five months after the spacecraft became the first to land in Mars’ arctic plains and taste water on another planet.
Mission engineers have not heard from the Phoenix lander in over a week. It fell silent shortly after a raging dust storm blocked sunlight from reaching its solar panels. Although ground controllers will direct two satellites orbiting Mars to listen for Phoenix for several more weeks, the chances that it will respond are slim.
“We are actually ceasing operations, declaring an end of mission operations at this point,” said project manager Barry Goldstein of NASA’s Jet Propulsion Laboratory, which managed the US$475 million mission.
Phoenix’s demise was predicted. Unlike its hardy twin rover cousins Spirit and Opportunity, which are approaching their fifth year near the red planet’s more hospitable equatorial region, Phoenix’s days were numbered from the outset. With sunlight waning and winter encroaching the arctic plains, scientists had said it was a matter of time before Phoenix would freeze to death.
Since its successful landing in May, Phoenix has sent back a bonanza of scientific discoveries. Its first breakthrough was the confirmation of ice at its landing site. Previous measurements from space suggested there was frozen water lurking inches below the surface, but Phoenix became the first robotic probe to touch and taste it by melting icy soil in one of its lab instruments.
Originally pegged to last three months, Phoenix lasted a little over five months, flexing its long arm to dig trenches in the soil and delivering dirt and ice to its onboard instruments to analyze.
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