银河系的新面貌

跨越地平线

This artist's concept illustrates the new view of the Milky Way, along with other findings presented at the 212th American Astronomical Society meeting in St. Louis, Mo. The galaxy's two major arms (Scutum-Centaurus and Perseus) can be seen attached to the ends of a thick central bar, while the two now-demoted minor arms (Norma and Sagittarius) are less distinct and located between the major arms. The major arms consist of the highest densities of both young and old stars; the minor arms are primarily filled with gas and pockets of star-forming activity.

这艺术家的概念，说明了新的银河系模型图，由在密苏里州的圣路易斯美国天文学会的第212次会议上，认为银河系中央是棒状的，而延伸出的两条主悬臂为Scutum-Centaurus和Perseus悬臂，较少的悬臂位于两条主悬臂之间。主悬臂由主序星构成，小的悬臂主要是新恒星诞生的地方。

该照片由Spitzer天文望远镜拍摄：2008-06-03

[ 本帖最后由 跨越地平线 于 2008-7-13 08:38 编辑 ]

lang666

很梦幻