The size of the Universe http://cosmictimes.gsfc.nasa.gov/teachers/guide/age_size.html
2006
Age: 13.7 Billion Years
Size: 94 Billion Light Years
The most distant objects in the Universe are 47 billion light years away,
making the size of the observable Universe 94 billion light years across.
How can the observable universe be larger than the time it takes light to
travel over the age of the Universe? This is because the universe has been
expanding during this time. This causes very distant objects to be further
away from us than their light travel time.
d*********r 发帖数: 11979
2
940 亿光年前，李大师横空出世。
a****p 发帖数: 6155
3
faint
光年 is a unit of length.
【在 d*********r 的大作中提到】 : 940 亿光年前，李大师横空出世。
k****r 发帖数: 5335
4
果然是工农兵干部子弟，可以不学无术，哈哈哈
【在 a****p 的大作中提到】 : faint : 光年 is a unit of length.
