Mars rovers reach fifth anniversary

日期:2019-03-09 03:08:18 作者:牧先记 阅读:

Five years ago this week, NASA’s twin Mars rovers touched down on opposite sides of the Red Planet. When Spirit and Opportunity rolled off their landing platforms and began conducting experiments, they were expected to operate for around three months – by which time their solar panels should have been plastered with sunlight-blocking dust. But five years on both rovers are still going, although Spirit is ailing. So what is their secret? “It has been a combination of three things,” says Steve Squyres, the Mars Exploration Rover Mission’s lead scientist. “First, we built some very good hardware,