【科普贴】从10亿光年到0.1飞米 [复制链接]

原帖由 珍妮 于 2005-10-25 09:59 PM 发表 没看过呢~ 偶现在很封闭呢,啥都不看 叔叔介绍点好书看看呀

这都是三四年前无聊看的，很久都没看中文杂志了，现在偶也不知道啊:A:

原帖由 珍妮 于 2005-10-25 10:27 PM 发表 是哦,那也是我几年前很有求知欲望的时候看滴~

求知欲望摸油了，现在又有啥新欲望啦:n34:

2005 October 29


NGC 3242: The Ghost of Jupiter
Credit: Bruce Balick (U. Washington) et al., HST, NASA

Explanation: After a star like the Sun completes fusion in its core, it throws off its outer layers in a brief, beautiful cosmic display called a planetary nebula. NGC 3242 is such a planetary nebula, with the stellar remnant white dwarf star visible at the center. This nebula is sometimes called The Ghost of Jupiter for its faint, but similar appearance to our solar system's ruling gas giant planet. NGC 3242 is light-years across however, and much farther away than the measly 40 light-minutes distance to Jupiter. In fact, while watching this ghostly nebula expand over time, astronomers have estimated the distance to NGC 3242 to be about 1,400 light-years. The red FLIERs visible near the edges of the nebula are still a bit mysterious, though.