火星上的日出!

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Sunset on Mars
On May 19, 2005, NASA's Mars Exploration Rover Spirit captured this stunning view as the Sun sank below the rim of Gusev crater on Mars. This Panoramic Camera mosaic was taken around 6:07 in the evening of the rover's 489th Martian day, or sol.

Sunset and twilight images are occasionally acquired by the science team to determine how high into the atmosphere the Martian dust extends, and to look for dust or ice clouds. Other images have shown that the twilight glow remains visible, but increasingly fainter, for up to two hours before sunrise or after sunset. The long Martian twilight (compared to Earth's) is caused by sunlight scattered around to the night side of the planet by abundant high altitude dust. Similar long twilights or extra-colorful sunrises and sunsets sometimes occur on Earth when tiny dust grains that are erupted from powerful volcanoes scatter light high in the atmosphere.

Image Credit: NASA/JPL/Texas A&M/Cornell

pao

好久没看到过了    久违的家乡啊m062

[quote]原帖由 [i]HAHA[/i] 于 2008-6-5 23:03 发表 [url=http://bbs.pyyrf.com/redirect.php?goto=findpost&pid=17054&ptid=13242][img]http://bbs.pyyrf.com/images/common/back.gif[/img][/url]

好久没看到过了    久违的家乡啊 [/quote]

我刚从土星回来经过火星，发现你们家正在被木星人侵略。haha

回复 #3 几几何 的帖子

m062 你家也被我干掉了!

回复 #2 HAHA 的帖子

你吹水的本领好厉害喔m062

回复 #4 admin 的帖子

你一定认错人了，我们都在家里没看见一个坏人dian

似乎论坛成日只系得我哋几个系度水。:)9

回复 #7 几几何 的帖子

慢慢会多起来的。