Sophisticated instruments used by astronomers enable earthlings to see beyond what was once the cloudy barrier of the Milky Way, to a universe of perhaps 100 billion other galaxies. NOVA takes a trip into outer space to see these clusters which are as old as time and several million light years away.
一旦会员分享他们的想法，评论就会出现在此处。
暂无音乐
添加原声