庆祝NASA勇气号和机遇号探测器登陆火星
NASA’s twin rovers, Spirit and Opportunity, stand on the Martian landscape in this poster created to commemorate their 20th landing anniversary.
The rovers landed in January 2004, on opposite sides of the planet in locales that scientists suspected had been affected by liquid water in the past. Their main scientific objective was to search for a range of rocks and soil types and then look for clues for past water activity on Mars—and what they found rewrote textbooks.
In addition to proving that water once existed on Mars, the rovers also far exceeded their initial planned lifetimes. Spirit operated for 6 years, 2 months, and 19 days, more than 25 times its original intended lifetime, and Opportunity operated for almost 15 years, setting several records.
Download the poster free here.
Image Credit: NASA/JPL-Caltech
这张海报是为了纪念NASA的两辆火星车勇气号和机遇号登陆火星20周年而创作。
火星车于2004年1月在火星的两侧着陆，科学家们怀疑这些地方过去曾受到液态水的影响。他们的主要科学目标是寻找一系列岩石和土壤类型，然后寻找火星上过去水活动的线索——他们的发现改写了教科书。
除了证明火星上曾经存在过水之外，这些火星车还远远超出了它们最初计划的寿命。勇气号运行了6年2个月19天，是其原定寿命的25倍多，机遇号运行了近15年，创造了多项记录。
图片来源: NASA/JPL-Caltech
