All quiet on Mars

 作者:原刍     |      日期:2019-03-07 01:09:00
PLANS to send a microphone to Mars on the French space agency’s Netlander mission in 2007 may be in vain. Scientists had hoped to listen for earthquakes and Martian storms. But James Chambers from the University of Mississippi has calculated that sound on Mars will travel a mere 0.2 per cent of the distance it travels on Earth because the air pressure is so low. The problem is made worse, he says, because carbon dioxide, the main gas on Mars,