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Scorch marks left by spacecraft on Mars soon fade

作者:尚茨    发布时间:2019-03-05 02:04:05    

WE’VE been making a mess on Mars, but the Red Planet tidies up after us. A study of the scorch marks left by the Curiosity rover and Phoenix lander as they touched down on Mars has revealed that they fade over time. Ingrid Daubar of NASA’s Jet Propulsion Laboratory in California and her colleagues gathered images of the Curiosity and Phoenix landing sites taken by the Mars Reconnaissance Orbiter over a number of years. By measuring the relative amount of light reflected by the scorch marks and pristine soil in each picture, Dauber calculated that it should take 2.6 Earth years for them to disappear completely. That could be important for NASA’s next lander, the InSight mission, which will study heat flow on the planet’s surface. The work was presented at the Lunar and Planetary Science Conference in The Woodlands, Texas, last week. This article appeared in print under the headline “Spacecraft scorch marks fade away” More on these topics:

 

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