过一会，大家注意一下窗外的太阳。。。上次的日环食我全程看到了。。。
今天下午，罕见的日环食天象将在我国上演。上次在我国发生的日环食是在1987年9月23日。此次新世纪首次日环食，被称为中国22年以来的首次日环食，也是全球未来1000年持续时间最长的日环食。日环食全程将持续约5个小时，环食带平均宽达300千米，环食时间最长达8分钟多。本市天文学会成员们已赶赴山东专程观测这次罕见的日环食。我国西南部地区有幸看全过程。
Annular eclipse in Africa and Asia on January 15
Solar eclipses are magnificent and awe-inspiring, but they aren’t all that rare. There are at least 2 solar eclipses in every calendar year. A solar eclipse happens when the new moon passes in front of the sun as seen from Earth, blocking out our view of the sun’s disk.
If the moon totally covers the sun, it's called a total solar eclipse. If the moon partially covers the sun, it's a partial solar eclipse. There's also a third kind of eclipse – an annular eclipse – and tomorrow's eclipse is this kind.
Tomorrow’s eclipse – Friday, January 15 – is the first of the two solar eclipses that will take place in 2010. But, as always with solar eclipses, you’ll have to reside on the right place on the Earth’s surface to see the moon pass directly in front of the sun tomorrow. During this annular eclipse of the sun, the moon will not hide the sun from view. Instead, at mid-eclipse, an annulus, or ring, of sunshine will surround the new moon silhouette.
An annular eclipse makes a wondrous picture, like the image above from eclipse master photographer Fred Espenak. But an annular eclipse is essentially a partial eclipse. At no time will observers be able to observe the eclipse without special filters to block the sun’s harmful rays.
People in central Africa and parts of Asia will see the annular eclipse tomorrow. The long yet narrow annular eclipse path begins at sunrise in central Africa and ends at sunset in eastern China. Outside the annular eclipse path, people in much of Africa and almost all of Asia will see a partial eclipse.
If you’re in a position where you can watch this eclipse, make sure to use proper eye protection.
(source: earthsky.org) |
发表于 2010-1-15 14:25:40
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发表于 2010-1-15 14:41:38
