[酷图] 天文幻想画：被小行星撞击后的某个行星系统的卫星残骸。
Drawing Credit: Dan Durda (SWRI)Explanation: Could an asteroid destroy civilization on Earth? Mountain-sized space rocks could potentially impact the Earth causing global effects, and perhaps even be mistaken for a nuclear blast of terrestrial origin. Such large impacts are rare but have happened before. Modern telescopes have therefore begun to scan the skies for signs of approaching celestial hazards. Over the past year, projects such as Spacewatch and Spaceguard have continually discovered previously unknown asteroids that indeed pass near the Earth. Such projects are still rather modest, however. In June, 100-meter asteroid 2002 MN was discovered only after it whizzed by the Earth, crossing even within the orbit of the Moon. This year brought much discussion in the astronomical community of expanding technology to discover most large Near Earth Objects and extend the time between discovery and impact for all potential astronomical hazards. Pictured above is an illustration of a busy planetary system, showing the view of a planet ringed with space debris from a recently formed crater of an orbiting moon.
http://antwrp.gsfc.nasa.gov/apod/image/0212/caldera_durda_big.jpg
麻烦解哥把国外网站的图片下载后在发表，谢谢
麻烦解哥把国外网站的图片下载后在发表，谢谢！很多外国网站往往连不上，55555555555~~~
呵呵，我也想呀，但图片太大了超过了论坛允许的400K。
如果你想要的话我可以考虑给你发到信箱里。谢谢解哥,小弟求之不得
我的信箱是Discovery_BUN@sohu.com已经发出。
RT
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