今天的APOD是个漂亮的摄影图,美国魔鬼塔景区上空的壮丽银河全景。——我尚未去过美国。
http://apod.nasa.gov/apod/ap090729.html
2009 July 29
The Milky Way Over Devil's Tower
Credit & Copyright: Wally Pacholka(TWAN)
Explanation:
Was Devil's Tower once an explosive volcano?Famous for its appearance in films such asClose Encounters, the origin ofDevil's Tower inWyoming,USA is still debated, with a leading hypothesis holding that it isa hardened lava plume that probably never reached the surface to become avolcano. The lighter rock that once surrounded the dense volcanic neck has now eroded away, leaving the dramatic tower.High above, the central band of the Milky Way galaxy arches across the sky.Many notable sky objects arevisible, including dark strands of thePipe Nebula and the reddishLagoon Nebula to the tower's right.Green grass and trees line the foreground, while moon-illuminated clouds appear near the horizon to the tower's left.Unlike many other international landmarks, mountaineers are permitted to climbDevil's Tower. |
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