• Astronomers now believe there's a supermassive black hole at the centre of almost every galaxy in the Universe. These black holes can have millions, or even hundreds of millions of times the mass of the Sun. Unlike stellar mass black holes, the supermassive versions might have formed differently, going from a cloud of gas directly to a black hole - skipping the star stage entirely.


    Since their discovery, astronomers still don't really know how supermassive black holes got going. But there they are, inside most galaxies. In fact, quasar observations show that supermassive black holes were present in the early Universe. Quasars are some of the brightest objects in the Universe, blazing from the radiation emitted by supermassive black holes actively consuming material.

    One possibility is that these monsters had humble beginnings, starting out as a massive star, going supernova, and then becoming a black hole. It's a process astronomers understand fairly well. The problem with this theory is that these early supermassive black holes must have been growing constantly right from the beginning, at the maximum rate predicted by physics. And as we see today, galaxies go through active and quiescent stages depending on when their black hole is consuming material.

    But a second possibility is that these black holes formed directly, pulling together so much material that they bypassed the stellar stage entirely.

  • 2007-09-06

    1/3理想


    我和我仅有的理想 走在寻找的路上


    有时清醒 有时迷茫 但愿别失去方向 方向

     

  • Jesus of Suburbia歌名:Jesus of Suburbia,来自GreenDay-American Idiot.我直接进主题吧。
    国内没有战争,生活氛围和平。但这支歌里的s.t.Jimmy唤起我强烈的同情心.因为战争,他背井离乡,生活动荡不安,毒品充斥着他的思想,爱与恨在他的眼里一点都不重要,“All signs mislead to nowhere.”
    我不反对战争,但这并不是说我支持战争。就象市场经济中的竞争一样,战争自然也有他存在的必要,存在且必然,影响力在于战争的激烈性。这里不谈。
    看完Jesus Of Suburbia的现场,我想大多数人都会为之感染。震撼不仅来自GreenDay精湛且引人入胜的表演,更因为这位真实存在的s.t.Jimmy,此时,我只想表达自己对挣扎与战乱中的人们发自肺腑的最诚挚的同情,尤其是对那些尚未来得及留下姓名便献身战场的士兵们。
  • 九月,看书.

  • 2007-08-31

    Supposed To Be

    a rush blood to the headA Rush Blood To The Head---很早之前下的coldplay,今天挑出了这张专集打发饭前的无聊时光.重点不在专集本身有多好听,而是第二首歌"In my place"里的一段:

    How long must you wait for it? How long must you pay for it?How long must you wait for it?

    词和乐搭配的很协调,这样的词就应该是这样的调子.