28 May
Posted by 嘉佑 as 推荐日志
(视频需要点时间打开,如果没耐心,还是去看图片吧。附在帖子后面了。)
上面的视频,是凤凰号降落在火星北极大平原上后不久,发回的照片。火星叔叔这块高纬度地盘看上去和地球上的多年冻土区差不多,到处都是沙砾,还有有趣的多边形裂痕。这些多边形图案暗示土壤下面有冰,图案是冰块随季节变化,周期性融解又冰冻产生的[1]。不过,Science 上这篇文章[2]的解释是冰块季节性热胀冷缩。不知道哪种说法更确切一点。
链接: 凤凰号火星登陆者网站
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