rjxie 发表于 2002-12-9 13:17

[酷图] 月影在非洲上空移动。（GIF动画）

EUMETSAT

Explanation: When the Moon's shadow reached out and touched the Earth last week, the result was a solar eclipse. Such an eclipse is total only for observers located along a narrow path corresponding to the ground track of the shadow's dark central portion or umbra. For this eclipse, racing along at nearly 2000 kilometers per hour, the Moon's umbra obligingly crossed over land along regions of Africa and Australia. Totality lasted for about two minutes or less at a given location. Many nearby regions fell within the lighter but much wider outer shadow region, the penumbra, and witnessed a partial solar eclipse. The above movie follows the Moon's shadow as it crossed Africa during a similar eclipse in June 2001. Each frame is separated in time by about 20 minutes. The movie was created from frames taken by the orbiting European satellite MeteoSat-6.

http://antwrp.gsfc.nasa.gov/apod/image/0212/eclipse_eumetsat_big.gif

lymex 发表于 2002-12-9 18:31

呵呵，非常直观！

过马路 发表于 2002-12-12 04:53

好看！只是月球的影子为什么那么糊？ 不象木卫的影子那样

太空生物 发表于 2002-12-12 22:47

现在看不到了???

活动星图 发表于 2006-6-6 05:03

本影和半影的界线看不清……

或者说看不到…………………

aardwolf 发表于 2006-6-8 21:37

本影区应该很暗啊，怎么还那么亮？月亮反光？
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