Yes, graphic computer software.

来源: 于 2012-09-06 08:13:32 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

I made it for about half a year.

You know galaxy is a new stuff for humans, but very very old natural being.

Its study by humans has been merely a kind of taxonomy. I turn it into a quantitive exploration.