Astronomy Picture of the Day
Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
2005 August 21
Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
2005 August 21
說明: 一朵雲怎會弄出這種形狀？上圖實際上是由數朵雲疊成一種引人注目的透鏡狀雲。正常情況下，空氣通常會水平移動，較少垂直運動。不過有時候，空氣遇到山脈或丘稜，有可能會出現較強較穩定的垂直振盪。這個振盪氣柱頂部的乾空氣，會因溼度的不同而分層，每一層就是一朵含有飽含水氣的雲，它們合起來形成一個層次分明的透鏡雲。上面這張照片是上星期在美國．夏威夷的基亞山附近拍攝的。
Authors & editors:
Robert Nemiroff
(MTU) &
Jerry Bonnell
(USRA)
NASA Web Site Statements, Warnings, and
Disclaimers
NASA Official: Jay Norris.
Specific rights apply.
A service of:
EUD at
NASA /
GSFC
& Michigan Tech. U.